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How Wire an American Standard Thermostat
American Standard, GE & Trane Thermostat Wiring Connection Tables
- POST a QUESTION or COMMENT about heating, air conditioning, and heat pump thermostat installation and wiring
Thermostat wiring details & connections for American Standard thermostats. This article gives a table showing the proper wire connections for the American Standard room thermostat used to control heating or air conditioning equipment.
These connections also work for most GE (General Electric and Trane) thermostats.
Room thermostat installation & wiring guide: this article series explains the basics of wiring connections at the thermostat for heating, heat pump, or air conditioning systems.
Our page top sketch, courtesy of Honeywell Controls, illustrates the wiring diagram for a traditional Honeywell T87F thermostat used for 2-wire single pole single throw control of heating only in a typical gas-fired heating system.
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American Standard, GE & Trane Thermostat Wiring Guide
How to Wire a General Electric (GE), Trane, American Standard HVAC Thermostat |
||
| Numbers | Refer to the equipment wiring diagram (usually glued inside the equipment access covers and in the the installation/service manual). May be stages of electric heat, especially on Air-Pro, Borg Warner, Coleman-Evcon, Frasier Johnson |
|
| Blue, Brown, Tan, or Gray | Service indicator lamp | |
| Pink or other color | Second stage of heat (may be same as (W) on heat pump or oil/gas systems. | |
| Second stage of electric heat on GE/Trane/American Standard systems. Also used as indicator lamp or misc. contact on other systems. | ||
| Blue, Pink | Compressor second stage | |
We provide thermostat wiring connections for just about every type of residential heating or cooling room thermostat as well as a description of thermostat wiring color codes & conventions.
On 2019-03-04 by (mod) -
How to Debug a Thermostat by First Eliminating the Thermostat and its Wires from Heater (or A/C) Operation
NO Ken I was saying that you can simplify the diagnosis of a thermostat wiring problem by eliminating the thermostat and all of its wiring from the equation.
- Go to the heating equipment primary control
- Find the place on that control where the thermostat wires connect - normally marked T1 and T2 or just T and T.
- Disconnect the thermostat wires from the control
- Now, remembering that the thermostat is nothing but a low-voltate-operated On-Off switch that turns the control on or off on a call for heat (or cooling), just jumper the two T - T terminals on the control.
- Watch what happens. Does the heater or A/C run properly?
That's exactly the same effect you'd see IF the Thermostat on the wall in the occupied space were calling for heat.
Now
IF the heater runs normally (or on a hot water heating system the zone valve operates)
THEN we know that the problem is at the thermostat or in the wires between the thermostat and the control
On 2019-03-04 by ken
Are you saying to disconnect the heating element and then jumper 2 of the termiinals together and reconnect the heating element to see if that works and do this until you get the correc2 terminals?
On 2019-03-04 by (mod) -
Disconnect wires AT THE HEATEr
and then see if connecting the two T T terminals there cause the heater to run. Then you'll understand where you are.
Watch out: when we're not familiar with electrical wiring it's safest to get on-site help - making a mistake could become a disaster and with heating systems risks fire, shock, or worse.
On 2019-03-04 by ken
You are saying just jumper 2 terminals at a time together and see if any of them turn on the heat. If so then those are the 2 that need connected to the thermostat.
On 2019-03-04 by Anonymous
I'm stuck YouTube partly because I'm not sure exactly what your equipment and wiring are doing. I think what you might do is work backwards from your heating system.
You should have to thermostat wires connected to the thermostat connections at your heater that will call for heat if you simply connect or jumper those two terminals the heat turn on if it doesn't then you've got the wrong terminals at the heater or something is broken.
If he does turn on by jumping the thermostat terminals at the heater and you know that you just need those two wires brought to a thermostat that it's needed to act as a simple on-off switch.
On 2019-03-04 by ken
I need to know If the 2 wire thermostat will work doingg this and which of the 8 terminals I need to use. We bought a 2 wire thermostat and used the terminals on the unit labeled red and white which is what is marked on the thermostat. but it would not come on.
On 2019-03-03 - by (mod) -
You'll be heating in the more-expensive electric backup heat mode but it's possible.
On 2019-03-03 by ken
Can I use the inside unit from an American standard system as a furnace to heat my garage? If so how many wire thermostat do I use and how do I connect in the unit.
This is the air handler I suppose from an electric system Model #TWV025B14oA1. In other words I guess what I am saying is I do not have the outside unit. just the air handler with the auxillary heat in it.
On 2019-03-03 by (mod) -
Sorry I don't understand the question - what "inside unit" and what "american standard system" to be used as a "furnace" ?
A furnace is a forced warm air heating system
Typically a simple 2-wire thermostat is used to control a heat-only system.
On 2019-03-02 by ken
Can I use the inside unit from an American standard system as a furnace to heat my garage? If so how many wire thermostat do I use and how do I connect in the unit.
On 2016-02-21 - by (mod) -
Tom: Check the wiring diagrams in your installation instructions sheet for the American Standard ACONT802 thermostat. You'll see that there are different terminal identifications for different applications such as Heat/Cool, Heat Pump. For EXAMPLE (this may not be your system), X2 is actively used in a single stage heat pump with an aux backup heat source and connects on the board to W2, or with a multi-stage, to W3 - relays for backup heat.
On 2016-02-21 by Tom
The FocusPro 6000 also has an "E" terminal.
On 2016-02-21 by Tom
I have swapped the residences of a Honeywell FocusPro 6000 series thermostat (TH6220D) and an American Standard ACONT802AS32DA thermostat. When swapping the FocusPro 6000 to where the ACONT802 was I found the ACONT802 had an extra wire connected to the X2 pin... does this connect to the remaining pin on the FocusPro at the "L" terminal? What is this wire for? Can it be left unused?
Thanks- Tom
On 2015-08-31 - by (mod) -
If there is no power to the thermostat check for 24VAC at the transformer that powers it - usually located in or near your inside air handler; if there is power there then the TT wires are perhaps disconnected or broken.
On 2015-08-30 19:20:44.538107 by Robert
Lost 24vac to thermostat. System is American Standard heat pump, Heritage 11, manufactured Sept, 2000. Is there a fuse or a reset button that's not shown on the schematic
Question: Replacing a round Honeywell T87 with a Digital Honeywell Thermostat
Hello - I am replacing a round Honeywell thermostat with a non-programmable digital Honeywell unit. I have a hot water system with multiple zones and with no air conditioning.
There are three wires at the thermostat. On the old round unit the red wire went to the R terminal, the white wire went to the w terminal and a green wire went to B terminal. I hooked up the new stat the same way but it would not work.
If I selected "fan on" instead of "fan auto" the zone would heat up but would not shut off (hot water kept flowing even if I selected a temp below room temp). Appreciate your help. - Patrick - 1/20/12
Reply:
Patrick, typically the three wire thermostat hookups would be exactly the same for the old and new thermostats.
For details of wiring a typical and simple digital Honeywell thermostat,
see Honeywell 5-2 Day Programmable Thermostat - RTH2300B1012.
For help in understanding the wiring of your old thermostat,
see Three-Wire Honeywell Wall T87-F type Thermostat wiring and also
see Generic HVAC Thermostat Control Wiring Points
Question: Replacing a mercury thermostat with a digital unit
I am replacing an old mercury thermostat with a digital. my system is a heat pump. my neighbor gave me the digital, no instructions, no box.
Ii'm trying to decide if this is even a heat pump compatible thermostat. on the therm it has
c, g, rc, rh (which are linked by a black wire.)
w, y, b, and o. coming out of my wall is, white connected on old therm w2, yellow connected to y, green conn g, black conn e, red to r, blue to b and bro to x. any help would be great. - Kurt 6/4/12
Reply:
Kurt, as you see in the examples at For help in understanding the wiring of your old thermostat,
see Three-Wire Honeywell Wall T87-F type Thermostat wiring and also
see Generic HVAC Thermostat Control Wiring Points. Many thermostat wiring setups are straightforward or "cookbook" but why not find the brand name on your thermostat and then you can obtain the installation instructions right from the manufacturer?
Also, Honeywell's thermostat replacement advice (and most likely that of all thermostat manufacturers) warns:
Watch out: MERCURY NOTICE: Do not put your old thermostat in the trash if it contains mercury in a sealed tube.
Contact your local waste management authority for instructions regarding recycling and proper disposal.[5]
...
Continue reading at THERMOSTAT INSTALLATION STEPS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.
Or see these
Recommended Articles
- AMERICAN STANDARD AGE MANUALS & PARTS GUIDES - heating equipment
- AMERICAN / AMERICAN STANDARD WATER HEATER AGE & MANUALS - water heaters
- AMERICAN STANDARD THERMOSTAT WIRING - thermostats
- THERMOSTAT WIRE TERMINAL ID CODES / FUNCTIONS
- THERMOSTAT WIRING COLOR CODES
Suggested citation for this web page
THERMOSTAT WIRING AMERICAN STANDARD at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.
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INDEX to RELATED ARTICLES: ARTICLE INDEX to HVAC THERMOSTATS
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Citations & References
In addition to any citations in the article above, a full list is available on request.
- [2] Thanks to reader S.R. for discussing loss of heat due to a thermostat wiring mistake, October 2010
- [3] Thank to Mr. Scott Meenen , G&S Mechanical Services , for providing some common thermostat wiring codes also found at Mr. Meenen's web page Malware Deleted 12/9/2014 . Mr. Meenan provides heating, heat pump, and air conditioning repair services in Maryland, Washington D.C., and northern Virginia. He can be contacted at 301-591-1646 or by Email to Malware Deleted 12/9/2014 - 10/2010. Quoting:
We service American Standard, Amana, Arco, Arco-Air, Bryant, Carrier, Coleman Evcon, Comfortmaker, Day/Night/Payne, Dunham-Bush, Fedders, Fredrich, Goodman, General Electric, Heil, Intertherm, ICP, Janitrol, Lennox (Armstrong, Johnson Air-Ease), Miller, Modine, Nordyne, Rheem/Ruud/Weatherking, Sears, Stewart Warner, Trane, Weather King, Williams, White-Westinghouse, Whirlpool, Weil Mclain, York, (Frasier Johnson/Borg Warner) and others. - [4] Azel Technologies Inc., P.O. Box 53138 10 Royal Orchard Blvd. Thornhill, Ontario, Canada L3T 7R9 Ph: 905-223-5567 Fax: 905-223-3778 Email: info@azeltec.com, Website: www.azeltec.com.
- [5] Honeywell Controls, the company wants you to use their contact form at this web page: http://www51.honeywell.com/honeywell/contact-support/contact-us.html
Honeywell Consumer Products, 39 Old Ridgebury Road Danbury, CT 06810-5110 - (203) 830-7800
World Headquarters, Honeywell International Inc., 101 Columbia Road, Morristown, NJ 07962, Phone: (973) 455-2000, Fax: (973) 455-4807 1-800-328-5111- Honeywell product model numbers & instruction Manuals: see http://yourhome.honeywell.com/home/Applications/FindYourModelNumber.aspx
- [6] White Rodgers Thermostats and HVAC controls,
Homeowner information: http://www.emersonclimate.com/en-US/brands/white_rodgers/Pages/wr-homeowner-info.aspx
Contractor information: http://www.emersonclimate.com/en-US/brands/white_rodgers/wr_contractor_info/Pages/white-rodgers-contractor-info.aspx
White Rodgers Product Catalog (don't misspell the company's name as White Rogers Thermostats) -
http://www.emersonclimate.com/Documents/thermostats.pdf - Thermostat Catalog - [7] White Rodgers 1F90 Low Voltage Digital Comfort-Set thermostat Installation Instructions, PN 37-3654, White-Rodgers Division, Emerson Electric Co., 9797 Reavis Rd., St. Louis MO 63123
- [8] "Automatic Oil Burner Controls - Thermostats", Domestic and Commercial Oil Burners, 3rd Ed., Charles H. Burkhardt, McGraw Hill, 1969 (and later editions), ASIN B0000EG4Y8
- [9] Thermostat wiring color codes & conventions, Thanks to reader " Helpful Pointers" Regarding 24V T, 10/7/2012
- [10] Domestic Central Heating Wiring Systems and Controls, 2d Ed., Raymond Ward, Newnes, ISBN-10: 0750664363, ISBN-13: 978-0750664363, Quoting from Amazon.com:
This unique A-Z guide to central heating wiring systems provides a comprehensive reference manual for hundreds of items of heating and control equipment, making it an indispensable handbook for electricians and installers across the country. The book provides comprehensive coverage of wiring and technical specifications, and now includes increased coverage of combination boilers, recently developed control features and SEDBUK (Seasonal Efficiency of Domestic Boilers in the UK) boilers ratings, where known.
In addition to providing concise details of nearly 500 different boilers fuelled by electric, gas, oil and solid fuel, and over 400 programmers and time switches, this invaluable resource also features numerous easy-to-understand wiring diagrams with notes on all definitive systems. Brief component descriptions are provided, along with updated contact and website details for most major manufacturers. - [11] Proliphix Corporate Headquarters [Website: proliphix.com] , 3 LAN Drive Suite #100, Westford, MA 01886 Phone: +1.978.692.3375 Toll Free (U.S.): 866-IP-LIVING (866.475.4846) Fax: +1.978.692.3378 - Sales: sales@proliphix.com Marketing: marketing@proliphix.com Customer support: support@proliphix.com http://www.proliphix.com/ - quoting from the company's website:
All Proliphix Network Thermostats come with our free Uniphy Remote Management Service. This unique offering lets you monitor and control your HVAC systems by simply pointing your Browser to our secure Proliphix Web Site. Enjoy the convenience of programming a thermostat from any location, using a simple graphical interface. No computer equipment or software is required. And since Proliphix takes care of the network configuration for you, you’ll be up and running in no time. We’ll even proactively monitor your thermostats and send you an immediate email or SMS message when an HVAC problem is detected. - [12] "Heating Control Handbook for the Installer and Service Man,Oil Burner, Gas Burner and Stoker Controls", Honeywell Corporation, March 1949 [copy on file as HoneywellControlsHandbookSA1399-2-1949.pdf] . Some of the controls discussed in detail here include the
- Honeywell T1 and T11A = Series 10
- Honeywell T21A (T2) = Series 20
- Honeywell T847A = Series 80
- Honeywell RA117A (RA1) = Series 10
- Honeywell LA101A = Series 10,
- Honeywell LA419A (LA4) = Series 40
- V155A = Series 10, V435A = Series 40, V575A = Series 50, V835A = Series 80
- [13] Trane TCONT800 Series Touch Screen Programmable Comfort Control Ownes Guide, American Standard, Inc., Troup Highway, Tyler TX 75711, January 2005, Telephone: Customer Service: 1-877-3381, website: www.trane.com
- Domestic and Commercial Oil Burners, Charles H. Burkhardt, McGraw Hill Book Company, New York 3rd Ed 1969.
- National Fuel Gas Code (Z223.1) $16.00 and National Fuel Gas Code Handbook (Z223.2) $47.00 American Gas Association (A.G.A.), 1515 Wilson Boulevard, Arlington, VA 22209 also available from National Fire Protection Association, Batterymarch Park, Quincy, MA 02269. Fundamentals of Gas Appliance Venting and Ventilation, 1985, American Gas Association Laboratories, Engineering Services Department. American Gas Association, 1515 Wilson Boulevard, Arlington, VA 22209. Catalog #XHO585. Reprinted 1989.
- The Steam Book, 1984, Training and Education Department, Fluid Handling Division, ITT [probably out of print, possibly available from several home inspection supply companies] Fuel Oil and Oil Heat Magazine, October 1990, offers an update,
- Principles of Steam Heating, $13.25 includes postage. Fuel oil & Oil Heat Magazine, 389 Passaic Ave., Fairfield, NJ 07004.
- The Lost Art of Steam Heating, Dan Holohan, 516-579-3046 FAX
- Principles of Steam Heating, Dan Holohan, technical editor of Fuel Oil and Oil Heat magazine, 389 Passaic Ave., Fairfield, NJ 07004 ($12.+1.25 postage/handling).
- "Residential Steam Heating Systems", Instructional Technologies Institute, Inc., 145 "D" Grassy Plain St., Bethel, CT 06801 800/227-1663 [home inspection training material] 1987
- "Residential Hydronic (circulating hot water) Heating Systems", Instructional Technologies Institute, Inc., 145 "D" Grassy Plain St., Bethel, CT 06801 800/227-1663 [home inspection training material] 1987
- "Warm Air Heating Systems". Instructional Technologies Institute, Inc., 145 "D" Grassy Plain St., Bethel, CT 06801 800/227-1663 [home inspection training material] 1987
- Heating, Ventilating, and Air Conditioning Volume I, Heating Fundamentals,
- Boilers, Boiler Conversions, James E. Brumbaugh, ISBN 0-672-23389-4 (v. 1) Volume II, Oil, Gas, and Coal Burners, Controls, Ducts, Piping, Valves, James E. Brumbaugh, ISBN 0-672-23390-7 (v. 2) Volume III, Radiant Heating, Water Heaters, Ventilation, Air Conditioning, Heat Pumps, Air Cleaners, James E. Brumbaugh, ISBN 0-672-23383-5 (v. 3) or ISBN 0-672-23380-0 (set) Special Sales Director, Macmillan Publishing Co., 866 Third Ave., New York, NY 10022. Macmillan Publishing Co., NY
- Installation Guide for Residential Hydronic Heating Systems
- Installation Guide #200, The Hydronics Institute, 35 Russo Place, Berkeley Heights, NJ 07922
- The ABC's of Retention Head Oil Burners, National Association of Oil Heat Service Managers, TM 115, National Old Timers' Association of the Energy Industry, PO Box 168, Mineola, NY 11501. (Excellent tips on spotting problems on oil-fired heating equipment. Booklet.)
- In addition to citations & references found in this article, see the research citations given at the end of the related articles found at our suggested
CONTINUE READING or RECOMMENDED ARTICLES.
- Carson, Dunlop & Associates Ltd., 120 Carlton Street Suite 407, Toronto ON M5A 4K2. Tel: (416) 964-9415 1-800-268-7070 Email: info@carsondunlop.com. Alan Carson is a past president of ASHI, the American Society of Home Inspectors.
Thanks to Alan Carson and Bob Dunlop, for permission for InspectAPedia to use text excerpts from The HOME REFERENCE BOOK - the Encyclopedia of Homes and to use illustrations from The ILLUSTRATED HOME .
Carson Dunlop Associates provides extensive home inspection education and report writing material. In gratitude we provide links to tsome Carson Dunlop Associates products and services.
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