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Hydrotherm gas boiler at InspectApedia.comHydrotherm Boiler Age & Manuals

Hydrotherm Age, Manuals, Parts Lists, Wiring Diagrams

  • POST a QUESTION or COMMENT about where to find Hydrotherm heating boiler installation and service or maintenance manuals and guides

For Hydrotherm heating boilers this page provides free downloadable manuals, wiring diagrams and repair guides.

We discuss how to find or estimage the age of a Hydrotherm boiler and discuss, in this case, the lack of a good Hydotherm boiler data tag serial number decoder. Instead we rely on context and surrounding clues to get the age of the boiler.

This article series gives free downloadable manuals for Air Conditioners, Boilers, Furnaces, Heat Pumps. Here we provide free downloadable copies of installation and service manuals for heating, heat pump, and air conditioning equipment, or contact information for the manufacturers who can provide that information for nearly all major brands of HVAC equipment.

Page top photo of a HydroTherm Model MR420 gas boiler data tag provided by reader Janna.

InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.

- Daniel Friedman, Publisher/Editor/Author - See WHO ARE WE?

Hydrotherm Boilers: Age, Parts, Manuals, Contact

Hydrotherm HI-125B-Propane Boiler Data Tag (C) InspectApedia.comHere we provide manufacturer contact information and direct links to free downloadable installation, service, and users manuals for Hydrotherm boilers.

Hydrotherm boilers (an "Advanced Thermal Hydronics" company, now owned by Mestek, www.mestek.com), encode the age in some but not all of the product serial numbers, depending on the Hydrotherm model and age.

Article Contents

Contact Hydrotherm Boiler Company

Age Decoder for Hydrotherm Boilers

Hydrotherm Boiler Data Tag (C) InspectApedia.com reader JannaUnfortunately, unlike some other boiler and furnace brands, Hydrotherm boiler age is not regularly or easily encoded in or decoded from the boiler serial number on the HydroTherm data tag.

And sadly only a few of the Hydrotherm IO Manuals that we've found include a publication date.

However if you provide a photo of your boiler's data tag and of the boiler itself, using the tips

at BOILER / FURNACE AGE GUESSER we'll give just below we may be able to make a more-specific guess at your boiler's age.

History of the Hydrotherm Boiler Company

Boiler Age Determination from Surronding Contex & Clues

Here are our tips for making an intelligent guess at hvac equipment age when there is no direct age decoder available.

When there is no direct age decoder for a boiler based on its serial number we look at the surrounding and contextual clues including the items given below.

Hydrotherm HI-125 Series Boiler data tag (C) InspectApedia.com Soto

Above: the data tag for a Hydrotherm HI-125B natural gas boiler.

Hydrotherm & ATG Advanced Thermal Hydronics Boiler Manual Downloads

Hydrotherm HC-100 boiler (C) InspectApedia.com Mario

Photo above: a Hydrotherm HC-Series gas boiler.

Hydrotherm HI-125B-Propane Boiler Data Tag (C) InspectApedia.com

Above: Data tag for a Hydrotherm HI-125B Propane Gas Boiler.

Hydrotherm HWX Gas Boiler at InspectApedia.com

Above: A HydroTherm HWX Gas Boiler (manual just below).

Hydrotherm KN-10 Boiler cited & discussed at InspectApedia.com

Above: A Hydrotherm KN-10 boiler from the KN-Series. (Control manual for this boiler is given just below).

Hydrotherm KN-30 gas boiler cited & discussed at InspectApedia.com

Above: a Hydrotherm KN-30 Condensing Gas Boiler (manual below)

Manual for the Hydrotherm MG-Series modular power gas boiler at InspectApedia.com

Above: The Hydrotherm MG-Series Moduler Power Gas Cast Iron Water Heating Plant (Manual below).

Hydrotherm Multitemp boilers in series cited & discussed with manual download at InspectAPedia.com

Above: Hydrotherm Multitemp boilers, MG-2310 (six models, catalog below)

HydroTherm R-2 gas boiler & manual at InspectApedia.com

Above: Sketch of the HydroTherm RC-2 gas fired cast iron boiler, models with standing pilot or intermittent pilot.

Hydrotherm VGAB Steam Boiler at InspectApedia.com

Above: HydroTherm VGAB-Series Gas-Fired Cast Iron Steam boiler.

...


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Reader Comments, Questions & Answers About The Article Above

Below you will find questions and answers previously posted on this page at its page bottom reader comment box.

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs

Trying to figure out my boiler model?

I’m trying to figure out what model my boiler is. The tag on the top is completely wiped clean. Can’t read anything. Thanks for any help. 2025-10-25 by Ray P

Hydrotherm boiler (C) InspectApedia.com

Moderator reply:

@Ray P,

Unfortunately from just the exterior we can't say more than that you are on the right page and that is is a Hydro Therm boiler.

It would be helpful to see the interior with the covers off and if you look there you may find an additional data tag that you should photograph and post here for me to see and comment upon.

Also, above on this page you will see some hydrotherm catalogs. Take a look through them because you may find a very similar model.

Also if you tell us the city and Country of location of the building where this heater is installed and the age of the building we can put a floor under the likely age of the boiler itself and that can point us to the right catalog.

Daniel Friedman

Follow up:

@InspectApedia Publisher, thanks for responding. I have looked all over this trying to find a tag. I have a lot of photos. I will post some. I have tried looking through the catalogs, I guess I’m just knowledgeable enough.

It’s in Baltimore, md. I think it was installed between 90 and 92. That’s my best guess

Hydrotherm boiler (C) InspectApedia.com

Reply:

@RayP,

That looks like one of Hydrotherm's Condensing boilers similar to those described in this manual

https://inspectapedia.com/heat/Hydrotherm-AM-Boiler-Manual.pdf

That sure looks like an original 1960's Hydrotherm boiler.

Boiler kicking on and off

We bought our house in 1984 immediately I noticed that there previously was an oil burning system and it had been changed to gas, I drain the system down quite often. Pull the burners and clean the area where the boiler sits, recently t I noticed that it kicks on and of too regularly for my liking . I believe that I need a new aqua stat.
My boiler model is HC-125 and the serial number isolx7848. How old is my boiler. 2025-01-29 by kenneth R Forde

Mod reply:

@kenneth R Forde,

Before replacing anything I would want to be very confident of an accurate diagnosis of the problem. We could be talking about something as simple as a dirty air filter or blocked air duct or an improper system tuning and adjustments.

So it might make sense to get a service technician on site.

Daniel

 

How can I figure out age of my boiler?

Hi, I was wondering if anyone can help me figure out what age this boiler is. 2024-03-23 by Home Inspector

Hydrotherm gas fired boiler data tag (C) InspectApedia.com

Mod reply:

Home Inspector,

Sure - take a look at HYDROTHERM BOILERS

other clues are on your data tag - that 1983 standard gives a floor under age.

and see if you can make out the serial number. I could not quite see it in your image.

Follow up:

@InspectApedia Publisher,

Thank you for your help I appreciate. I believe the serial number is QV-3048.

Is the year on the data plate 1983 not to be used for the age of the unit?

Reply:

Home Inspector,

The 1983 year is the date of a standard not the date that the heater was made. So no, you should NOT assume that that is the year the boiler was made. It could have been made in 1983 but also it could have been made later-on.

But it tells us that the heater would be no older than that year.

Above on this page we have a section on guessing the age of older Hydrotherm boilers and there we list a number of clues you can use.

Unfortunately I haven't found a reliable direct decode for your example: Hydrdotherm Gas Boiler SN: QV-3048. I've seen a few websites and AI generated claims that you could decode the year or year month in the 3rd and 4th digits of the serial number but in my opinion that is flatly wong - unreliable.

Tips for Making an Intelligent Guess at HVAC Equipment Age when there is No Direct Age Decoder Available

Best procedure when there is no direct age decoder for a boiler based on its serial number: look at the surrounding and contextual clues including at least:

1. the age of the building where the boiler is installed, refined by any evidence suggesting that the boiler replaced an older one in the same building

2. notes on the boiler's service tag

3. possible notes or even a publication date on the boiler's manual or instructions if a set was left with the boiler

4. Boiler brand and model number combined with a check at the boiler manufacturer may give a range of years over which that model was manufactured

5. Patent numbers on the boiler's data tags can set a floor (no-older than) under the boiler's age: look up each patent and note its year of publication

6. ANSI or other standard numbers and years included on the boiler's data tag, sic as the a-1983 on your Hydrotherm boiler example.

7. Manufacturer's address on the boiler data tag: in your example: HydrdoTherm, Rockland Ave., Nowalk, New Jersey 07647 can tell us something about the boiler's age:

- when was the manufacturer at that address ?

- notice address details such as the presence of a zip code (on U.S. equipment). In the U.S. the first zip codes were in use as early as 1963.

 

Manual needed for HydroTherm HC0125

Anyone have a PDF for a Hydro Therm HC-125? 2023-08-29 by Jared S

Mod reply:

@Jared S,

Above on this page we provide

HYDROTHERM HC-D BOILER MANUAL [PDF] also helpful in re the Hydrotherm HC-100 boiler

https://inspectapedia.com/heat/HydroTherm-HC-D-Series-Boiler-IOM-Manual-HCD2-501.pdf

that covers boilers of this model from 65,000 to 165,000 btuh

that should work for you.

Continuing...

We contacted the new Mestek division, Airtherm, to see if they had this manual for you. Their question is whether there is another letter after the HC that you gave us in your model number? And the assumption is that you are talking about a boiler, correct?

They didn’t have the original HC-B but did send us the HC-C and HC-E boiler manuals which now have a live link above on this page. (We already had the HC-D on the page above.)

If none of these work for you, or are close enough for whatever your need is for the manual, we encourage you to call them to see if they can help you further at 413-564-5535, the parent company Mestek’s number.

Otherwise we welcome any additional questions that we may be able to help with even without the manual.

1920s Brighton MA house Hydrotherm boiler

I’m trying to find the approximate age of this boiler from a house in Brighton MA, built in the 1920s. The tag is obscured by blackness. I’ll send a few comments with photos. One label says it was converted to gas so I’m guessing it was originally for oil. I’d appreciate any thoughts on the, thanks! 2023-05-22 by Betsy1

Brighton MA Hydrotherm boiler (c) InspectApedia.com

Label on the side

Brighton MA Hydrotherm boiler (c) InspectApedia.com

View after removing front panel

Brighton MA Hydrotherm boiler (c) InspectApedia.com

Pilot switch, I think

Brighton MA Hydrotherm boiler (c) InspectApedia.com

Mod reply:

@Betsy1,

Unfortunately, Hydrotherm did not have a typical standard for decoding the age of your boiler. Although part of the one photo is dark, I see the serial number on the side but the photo is not clear enough for me to read it accurately. In person, you may be able to fully read it. It looks something like E 5561?

By calling the company and giving them the serial number, they can often give you the date: USA 413 564 5515 or Canada: 905 672 2991

Continuing:

That BASO automatic gas shutoff switch gives an earliest-possible date of 1934, though we think your heater is a bit younger than that. The last probable age date would be 1957.

The Milwaukee Gas Specialty Company introduced the Baltimore-Automatic Shut-Off (BASO) switch in 1934.

In 1957 the Milwaukee Gas Specialty Company changed its name to BASO - the company is still in business today.

Baso Gas Products LLC, 450 E Horseshoe Rd, Watertown, WI 53094 USA,
Web: baso.com, offices in Australia Canada China Europe India and Mexico as well as the U.S.

Can you please help me find the age of my boiler?

Can you please help me find the age of my boiler? I have attached a picture of the nameplate. Thank you! 2023-02-27 by Doug

hydrotherm gas boiler data tag (C) InspectApedia.com

Mod reply:

@Doug,

By calling them with the serial number, the company can often give you the date: USA 413 564 5515 or Canada: 905 672 2991.

Hydrotherm, now owned by Mestek, www.mestek.com, has chosen not to give out ANY public information on how to decode their serial numbers.

Other than that, our best advice is above on this page where we discuss using boiler contextual clues to help determine its age.

 

Where can i get a thermostat for a Hydrotherm HC-100?

Hydrotherm HC-100 boiler (C) InspectApedia.com Mario

Hi, Where can i get a thermostat for a Hydrotherm HC-100 old Boiler - Must be compatible with 24V DC (not AC)

Oh, by the way - My Hydrotherm HC-100 Boiler was installed in 1967 and it is still running like a champ (AMAZING) but I need a new Thermostat, it must be 24V DC so that it can open the 3 zone valves. Thanks for any imput !

My Hydrotherm HC-100 with 3 electro zone valves On 2022-12-01 by Mario -

Reply by InspectApedia (mod) - Hydrotherm HC-100 Boiler manual needed

@Mario,

In our list of available manual downloads above on this page, see this:

HYDROTHERM HC-D BOILER MANUAL [PDF] also helpful re: the Hydrotherm HC-100 boiler

You can also contact the company directly at

The Hydrotherm Corp. 260 N Elm St. Westfield, MA 01085 USA Tel: 413-564-5515

by Mario

@InspectApedia ,

Downloaded the Hydrotherm HC-D manual as per your suggestion.

Will contact the Company as early as possible to inquire about a suitable thermostat. Thanks for the info !

 

How do I set the Auto/Manual on my HydroTherm R210 Boiler?

Have a hydro-therm r-210 boiler. Do I set it to auto or manual? On 2022-11-25 by Falcon

by InspectApedia (Editor) - hydro-therm r-210 boiler control settings

@Falcon,

I want to help but don't understand if you're asking about a control on your boiler (see the manual below) or about how to set your thermostat.

Normally if you've got hot water heat your thermostat will be set on AUTO

If you're asking about a Hydrotherm boiler control setting I need to understand what you're trying to adjust.

The manual for your Hydrotherm R-series boiler, if you don't have it, can be downloaded free at

HYDROTHERM R-SERIES BOILER MANUAL [PDF] - RC-2 installation operation maintenance manual for Hydrotherm Gas-Fired Water Cast Iron Boilers 180,000 to 300,000 Btuh Input Standing Pilot, Intermittent Pilot & Vent Damper

What's the proper pressure for Hydrotherm boiler?

I like to know at what the PSI meter should read when in heating service on the Hydrotherm on a 2 floor Home heating system On 2022-11-04 by Edith -

Answer by InspectApedia-911 (mod) - how to read the boiler pressure gauge

@Edith,

Sure, glad to help.

Let's sort out a few terms and numbers.

When your heat is by a forced hot water boiler system (hydronic heating), for a typical two story building, the water pressure in the boiler and piping will be at

12 psi when the boiler is cold,

and will get as high as into the high twenties, perhaps 28 or even 29 psi when the boiler is at full or hottest operating temperature - up to around 180 to 200 degF.

If the boiler gets hotter than 200F the pressure will exceed 30 psi and the boilers pressure/temperature relief valve will open to spill hot water and relieve pressure - a safety device.

What you call the "PSI meter" I'd call the boiler pressure gauge.

PLEASE take a look at this article:

GAUGES, HYDRONIC BOILER

where we explain how to read the boiler pressure gauge and what pressures mean, and where we offer boiler pressure gauge diagnostics.

 

Hydrotherm HI-125 Limit Relay stopped working - need wiring diagram

Hydrotherm HI-125 boiler tag - ca 1985 (C) InspectApedia.com WB

Photo: Hydrotherm HI-125 Boiler Data tag courtesy of IAP Reader William Balough by private email 2022-09-21

I am looking at a hydro therm boiler and the temp limit relay for some reason was working properly now it's not.

Is there a way to get the proper wiring diagram to help me figure out where the Short is.

We traced every wire, no evidence of anything burned up. When we initially fired up the boiler it was working fine and then randomly cut out but the blower was still running.

Checked all the voltages and the only place we lost voltage was the thermal relay on the bottom of the boiler going from where the thermostat wires came down and then out to the stat on the boiler itself that sets the internal water temp.

So we tried to jumper it and got an odd buzzing/clicking noise and the. Blower went into like a safety low speed but when we took the jumper off it went back to blowing high speed but still had no spark igniter

Microtemp G4AM0600 TF192C APM on a Hydrotherm boiler (C) InspectApedia.com Balough

Here is the relay that we think is failing: Microtemp G4AM0600 TF192C APM

Moderator reply: where to find boiler limit control instructions & wiring diagrams - Microtemp Thermal Fuse Replacement Instructions

Above on this page We have manuals for HydroTherm boilers but not your specific model - I'm still researching that.

(We added your photo there (keeping you anonymous) and will post this discussion to see if anyone else can help).

Meanwhile, the limit control is almost certainly not a unique Hydrotherm part. 

It sounds as if there is a failed relay or a jammed electric motor.

Give me a photo of and the model number and band of the limit control and we can probably find its wiring guide. 

Also see the instruction manuals and wiring diagrams for boiler limit controls at these pages where we may already have your limit control instructions:

AQUASTAT SELECTION GUIDE - complete list

LIMIT CONTROL, SINGLE

LIMIT SWITCH, BOILER

Some Starting Tests for your Hydrotherm Boiler

  1. Confirm that power is on to the boiler
  2. Confirm that the boiler temperature is well below the upper limit on the limit control - or typically below 180F - say at 150 or cooler.
  3. Confirm that you have line voltage at L1 & L2
  4. Disconnect the thermostat wires from the T - T terminals and then connect a jumper wire between those two terminals - that's the same as turning up the thermostat but eliminates the whole thermostat circuit from the equation
  5. Check for line voltage (120VAC) at Terminals 2 and 3 - the Circulator Terminals

    If you see no voltage at the circulator terminals then the control board relay may have failed GA

Watch out: if you are not familiar with safe electrical wiring and basic electrical testing, leave this procedure to your trained service professional - else you could be shocked or killed.

Following up:

That Microtemp G4AM0600 TF192C APM is probably a thermal fuse - here is

Microtemp's THERMAL FUSE CATALOG [PDF] - retrieved 2022/09/21 original source: https://climate.emerson.com/documents/data-sheets-bulletins-microtemp-thermal-fuses-product-information-application-notes-en-us-4107344.pdf

Excerpt:

Operating Principle

The active trigger mechanism of the thermal fuse is an exclusively formulated, electrically nonconductive pellet.

Under normal operating temperatures, the solid pellet holds spring loaded contacts closed.

When a predetermined temperature is reached, the pellet melts, allowing the compression spring to relax. The trip spring then slides the contact away
from the lead and the circuit is opened.

After the thermal fuse opens a circuit, the fuse needs to be replaced.

This replacement procedure must include correction of the fault condition before the product is operated again.

So you want to check for a seized motor or shorted wire or control board after replacing the fuse and before turning the system back on - else the new thermal fuse may simply blow again.

(Or buy a couple of them) <g>

Reader follow-up: relay burned up, back fed and fried the control board.

Sure as s**t, the relay burned up causing it to back feed and fried the board.

Thank you for all your help- William Balough 2022/09/22

Where to Download a manual for the Hydrotherm R210-C

I need a manual for the Hydrotherm R210-C - 2022-09-01

Moderator reply:

This Hydrotherm Manual, found at InspectApedia applies to your model

HYDROTHERM R-SERIES BOILER MANUAL [PDF] RC-2 / RC2 installation operation maintenance manual

also see

HYDROTHERM MODEL R SERIES INSTALLATION, OPERATION & MAINTENANCE MANUAL & REPLACEMENT PARTS LIST [PDF] - found as a live link above on this page

Often the -A manual will also pretend to be C or other models and may even cite them as included in the "A" manual with specific if minor differences.

So did you take a look at the a model manual to see if it also covers your C- model Hydrotherm R210

 

Need HydroTherm gas boiler Model HC125B Natural Gas SN CJL2136 identification & replacement: Calgary, Alberta

HydroTherm gas boiler data tag - partial - Carl Palomaki (C) InspectApedia.com

Help me age this unit? When about it was made! Snd how much for an energy efficient replacement to be shipped to Calgary, Alberta! My gas fitter will install it.
Carl - cpalomaki@ivloud.com - 2022/03/07

This Q&A were posted originally

at HOW TO REALLY CUT HOME HEATING COSTS

Moderator reply:

@Carl Palomaki,

Unfortunately your photo of the gas boiler data tag cut off the bottom but I think I see a sliver of text identifying it as a Hydrotherm gas boiler. Model HC125B Natural Gas SN CJL2136

So please see details including age decoding for HydroTherm boilers found above on this page.

Sorry, but we cannot provide the replacement Hydrotherm boiler sale/purchase that you asked about.

We do not sell anything. No products, no services.

InspectAPedia.com provides building and environmental diagnostic and repair information. 

In order to absolutely assure our readers that we write and report without bias we do not sell any products nor do we have any business or financial relationships that could create such conflicts of interest.

 

Question: Where to find the manual for my HydroTherm R-210B boiler

HydroTherm gas boiler identification and age data tag (C) InspecdtApedia.com ODonnell

I have a hydrotherm low pressure boiler model r-210b serial # rb 4880..I can’t find any info on this model..everything I find is on the r-210c..I’d like to find schematics on this unit or anything really. - Scott ODonnell 2021/12/15

Moderator reply:

Scott, this Hydrotherm Manual, found at InspectApedia applies to your model - often there's a publication date in the manual that can give an age range for your specific boiler model.

Often the -A manual will also pretend to be C or other models and may even cite them as included in the "A" manual with specific if minor differences.

So did you take a look at the a model manual to see if it also covers your C- model Hydrotherm R210

 

Need a minfold gasket for my Hydrotherm KN-20 Boiler

Looking for a quote on KN-20 manifold gasket, see Boiler tag photo for info On 2021-04-28 by Jeff Miller Willamalane Park and Rec.

by (mod) - where to buy a replacement manifold gasket for Hydrotherm boiler

Hydrothermo boiler gasket for KN20 boiler at InspectApedia.com

@Jeff Miller Willamalane Park and Rec., Sorry, but we cannot provide the product that you asked about.

We do not sell anything. No products, no services.

InspectAPedia.com provides building and environmental diagnostic and repair information.

In order to absolutely assure our readers that we write and report without bias we do not sell any products nor do we have any business or financial relationships that could create such conflicts of interest.

InspectAPedia is an independent publisher of building, environmental, and forensic inspection, diagnosis, and repair information for the public - we have no business nor financial connection with any manufacturer or service provider discussed at our website.

A brief summary about InspectAPedia.com can be read at ABOUT InspectApedia.com - https://inspectapedia.com/Admin/About_InspectApedia.php

However, there are numerous vendors of gaskets that fit your Hydrotherm KN20 boiler - I've seen prices from about $3.50 to $22. U.S.D. for gaskets like the one below.

Let's start by dipping into the IO manual for your Hydrotherm KN20 - to be sure you've got the exact part number right.

Continuing: if you don't already have the manual for your KN-20 you can download it as a free PDF from links on the page above - or try

HYDROTHERM KN-SERIES GAS BOILER IO MANUAL [PDF] (2014) Installation & Operation Instructions


HYDROTHERM KN-SERIES GAS BOILER CONTROLS MANUAL [PDF] this is the control IO manual for KN boilers

Can I Retrofit an older HCD2-501 Hydro-Therm boiler with Spill & Rollout switch units ?

Is there an aftermarket kit to retrofit an older HCD2-501 Hydro-Therm boiler with Spill & Rollout switch units ? On 2021-01-07
by Mike

by (mod) - add-on or retrofit flue gas spill switch kits for gas fueled heating equipment

Mike

Yes, there are retrofit flue gas spill switch kits that work on a variety of gas fired heating equipment when properly located and installed. An example is the Field Controls SSK-1 described by vendor literature as follows:

Kit form of GSK-3 or GSK-4 generally used on millivolt water heaters.

Can also be used with 24 VAC gas furnaces or boilers. Kit includes (2) GSK style Thermal Safety Switches, (1) 12-gauge Jumper Wire and (1) 6 ft. length 12-gauge lead wire.

SSK-3 switches not supplied with switch enclosures. TCA-1 or TCA-2 Thermocouple Adapter required for 30 millivolt applications.

Before and after adding this safety control on existing appliances, an installation inspection in accordance with the National Fuel Gas Code 54, Z223.1 Appendix H should be performed and a combustion analysis is recommended to determine the operating condition of the appliance.

Your installer will check to assure that this or a similar device can work safely with your HydroTherm boiler.

Also see this

FIELD-SSK1 FLUE GAS SPILL SWITCH INSTRUCTIONS [PDF]

And see details at

FLUE GAS SWITCH INSTALLATION & WIRING

FLUE GAS SPILL SWITCH SOURCES & SELECTION

What's the date of this Hydrotherm boiler? S/N OX-6385

I was wondering if u could tell me the date of this boiler. Model hc100 serial # ox6385.

Im trying to find a relay switch. Would i be able to call the co and give them this info and order one from them? Picture attached On 2020-12-12 by Tracey garcia -

What is the manufacturing date of R300B Cerial No. CHD1006 Boiler - I need parts

What is the manufacturing date of R300B Cerial No. CHD1006 Boiler On 2020-12-07 by Anonymous -

Answer by (mod) -

Most likely you can order the part you need from the local plumbing and heating supplier or if you call the manufacturer they can tell you who has the part that you need if it's Unique to your heater.

 

I need pilot assembly for a Hydrotherm HC 145C boiler

Looking for pilot assembly for Hydro Therm HC-145C - On 2020-05-25 by jmacduff -

by (mod) - where to buy pilot assembly for Hydro Therm HC-145C

JM

Sorry, but we cannot provide the product you asked about. We do not sell anything. No products, no services. InspectAPedia.com provides building and environmental diagnostic and repair information.

In order to absolutely assure our readers that we write and report without bias we have no business nor financial connection with any manufacturer or service provider discussed at our website.

A brief summary about InspectAPedia.com can be read at https://inspectapedia.com/About_Us.htm

However
Numerous suppliers sell HydroTherm boiler parts including the pilot assembly, such as https://controlscentral.com/ illustrated above.

Hydrotherm Model GW743 Serial No. C-1361 Age?

We have a hydrotherm boiler. Serial number is C-1361 model number GW743. Any idea how old it is and do we wait until it finally stops working to replace it? And do u reccommend a dual boiler water heater? Thanks 2020/05/08 rowergirl@rogers.com

Moderator reply: clues for obtaining a boiler age when it's not neatly encoded on the data tag

Rower

The best info we have on decoding Hydrotherm boiler serial numbers and more details about Hydrotherm boilers as well as contact info and manual downloads is above on this page.

Hydrotherm boilers (an "Advanced Thermal Hydronics" company, now owned by Mestek, www.mestek.com), encode the age in some but not all of the product serial numbers, depending on the Hydrotherm model and age.

By calling-in the serial number the company can often give you the date:

USA 413 564 5515

I need to know the age of this commercial Hytdrotherm MR420 boiler!

Hydrotherm Boiler Data Tag (C) InspectApedia.com reader JannaI need to know the age of this commercial broiler!
Hydrotherm inc.
Model MR420

I have a HydroTherm model HC-100 and the serial number OX-8204 On 2019-09-19 by Janna -

Reply by (mod) -

You can also contact the company directly at

The Hydrotherm Corp. 260 N Elm St. Westfield, MA 01085 USA Tel: 413-564-5515

Help me out by typing the serial number - I THINK it reads CA11288 but I'm not sure.

Checking out our article: HVAC MANUALS, PARTS LISTS, WIRING DIAGRAMS - where I'm sorry to say that Hydrotherm, now owned by Mestek, www.mestek.com, has chosen not to give out ANY public information on how to decode their serial numbers.

However by calling in the serial number the company can often give you the date:

USA 413 564 5515 or Canada: 905 672 2991

Contact:

The Hydrotherm Corp. 260 N Elm St. Westfield, MA 01085 USA Tel: 413-564-5515

Hydrotherm Canada 5211 Creekbank Rd. Mississauga, ON L4W 1R3 Canada Tel: (905) 625-2991 Fax: (905) 625-6610

Website: http://www.hydrotherm.com

 

Hydrotherm serial number ra 1535 model r180 B trying to find the age

Hydrotherm serial number ra 1535 model r180 B trying to find the age - On 2018-03-14 by John Mullen

by (mod) -

John

You will need to call the company. See details at

https://inspectapedia.com/heat/Hydrotherm-Age-Manuals-Contact.php

Hydrotherm HNA-3191 gas boiler age needed

Hydrotherm gas boiler age needed serial number HNA-3191 On 2017-04-20 by Ron -

by (mod) re: decoding the age of a Hydrotherm boiler from the serial number

Ron

Hydrotherm boilers (now owned by Mestek, www.mestek.com) encode the age in some but not all of the product serial numbers, depending on the Hydrotherm model and age.

By calling-in the serial number the company can often give you the date: USA 413 564 5515 or Canada: 905 672 2991

Hydrotherm as well as Carson Dunlop's Technical Reference Guide (cited in the home page for this topic at AGE of HEATERS, BOILERS, FURNACES) note that the date is often stamped at the bottom of the Rating Plate on the boiler.

But if don't see an obvious 2 or 4 digit year code, then you'd need to call the manufacturer. We include some example Hydrotherm boiler age decodings below.

With Hydrotherm's newer serial numbers in the format AA-1234-5678 the year is in positions 1234.

For SOME older Hydrotherm boilers the age follows AAA-1234 where I think digits 12 encode the week and digits 34 encode the year.
Your HNA-3191 then decodes to 1991

For OTHER older Hydrotherm boilers the age is encoded in the serial number in the first two or three positions, example:

Serial No. 8228474 with no alphabetic characters encodes the year in the first to digits as 82 = 1982

M-150 serial 08607162 encodes the year in the 2nd and 3rd digits so 086 = 1986
A-150 serial 8506226 encodes the year in the first two digits so the year = 1985

Adding to this Hydrotherm boiler hullabaloo, on other newer Hydrotherm models the year is encoded as a capitalized alphabetic character at the end of the alphabetic part of the serial number,
e.g.
OR-140 serial SCSC -1153 the last "C" decodes to 1992 and a "D" in a similar position will decode to 1993

You can also contract the company directly at
The Hydrotherm Corp.
260 N Elm St.
Westfield, MA 01085 USA
413-564-5515

or

Hydrotherm Canada
5211 Creekbank Rd.
Mississauga, ON L4W 1R3
Canada
Phone: (905) 625-2991
Fax: (905) 625-6610
Website: http://www.hydrotherm.com

See HYDROTHERM Boilers

 

How to Find the age of a a Hydro Therm HC 125, Serial # Or22088.

I am trying to find the age of my parents furnace. It is a Hydro Therm Model HC 125, Serial # Or22088. - On 2017-03-19 by Tonya Thompson

Answer by (mod) re: Decode the age of a Hydrotherm Boiler HC125

Since the year of manufacture is often coated in the serial number, I would guess 1988

But take a look at the "HC" Hydrotherm boiler manuals above on this page.

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