Water pump control switch noises:

Wwhat causes humming or clicking noises at a building water pressure control switch: diagnosis, warnings, advice.

This article describes the causes of noises heard at a water pump pressure control switch: humming or clicking.

We warn that some noises may indicate trouble and the need for repair, including very frequent clicking or relay switch humming. A stuck pump relay can burn up the switch or even cause a fire.

Water Pump Pressure Control Switch-Related Noise Diagnosis

Reader Question: humming water pressure pump control switch

My water Pump Pressure Switch seems to be emitting a low hum all of the time It sounds sort of like you hear around electrical transformers.

This is a new thing for the unit. My electric bill has also been high and my water pressure is intermittently low. I can make the hum stop by pressing on the plate that's connected to the springs. It sparks when I do this. Yikes! I suspect that the switch is stuck in the on position. What do you all think? Thanks! - James 11/27/12

(Feb 6, 2014) Ivan said:

The pump only hums. It was recently installed when the old one did the same thing. This is a water well. Could the Foot valve in the well be blocked causing the pump not to kick on

Reply:

James, the pressure control switch might click on and off, but humming?

First - make sure that the sound is coming from the switch itself and not from nearby water piping or from a nearby pump. Well pumps are not silent, and pump noise can be transmitted via water piping.

A mechanic's stethoscope can help make sure you've pinpointed the noise source.

Second - if you are convinced it's the switch, if tightening the electrical connections at the switch doesn't fix it (do this with power OFF) I would replace it promptly. The pump relay is an electromagnetic switch. If it is humming and vibrating it is probably failing and you're about to have

• a short circuit, maybe a switch burn-up or worse
• no water

Watch out: I wouldn't keep pressing on the relay. There's live 120V or 240V in that switch - touching exposed wires or connectors is asking for a potentially fatal shock. Keep me posted, what we learn will help other readers.

Ivan:

When a water pump only hums - that is, it's not moving water - the problem could be a bad pump motor, bad motor start capacitor, low voltage, OR - indeed as you speculate - if the pump has lost prime (perhaps due to a leaky foot valve) it may also seem to be doing nothing but humming a monotone.

Try turning off the pump and priming it manually. Then close the priming opening and turn on the pump.

If the pump sounds normal - even just briefly - that may confirm that it's running dry; sometimes you can recover water by repeat priming at the pump, but if the foot valve is bad, your pump will also keep losing prime. But that would be diagnostic.

Watch out: don't let a pump keep running dry -chances are you'll damage it.

See PUMP / SWITCH NOISE FAQs

Also see ELECTRIC MOTOR NOISE DIAGNOSIS where we diagnose humming electric motors and motors that won't start.

Reader Question: Clicking: after replacing pump and pressure tank the pump switch keeps clicking

Relay switch on water pressure device clicking when water is being used why and what is the fix please. - Anon 9/30/12

I replaced my pump and pressure tank. But when i turn on my water. i here the pressure switch go click click click non stop when i turn on water - Jerry 11/16/12

Reply: normal vs. abnormal well pump relay switch clicking frequency

Jerry,

It is normal for the relay switch to "click" on and off slowly when you are running water continuously.

It's a sound that folks don't notice if the switch is right next to a (noisy) well pump, but when the well pump is submersible (located in the well) the pressure control switch click may be about all you hear.

If the clicking is rapid - see my warning just above. If the click occurs say once every 30 seconds, that's normal. It's the pump switching on and off as pressure falls and rises.

Watch out: If the clicking pressure switch is switching the pump on and off very rapidly, say every second, TURN THE PUMP CIRCUIT OFF immediately to avoid damaging the equipment.

Then check WATER PUMP PRESSURE CONTROL SWITCH CHATTER where we explain causes of a control switch that turns on and off extremely rapidly, usually at the start or end of a pump-on cycle.

Then see WATER PUMP SHORT CYCLING CAUSES where we explain why a pump might turn on and off rapidly while water is being run in the building.

Check for a clogged water filter, a water valve that should be open is closed, or a waterlogged preside tank

Chattering Pressure Control Switch

Watch out: while a single on-off click is normal for pressure switch operation, a pump pressure control switch that buzzes or chatters is sick and needs repair or replacement.

Our home page where we explain all of the causes and cures for a chattering water pressure control switch is

WATER PUMP PRESSURE CONTROL SWITCH CHATTER

Excerpts are below:

Schneider, discussing maintenance of their Square-D pressure control switch series offers these explanations and cures for a chattering pressure control switch (adapted):

• Incorrect air pressure in an internal-bladder type pressure tank: check and correct the tank pre-charge pressure, set it to 2 psi below the switch cut-in pressure.
  
  See WATER TANK AIR HOW MUCH TO ADD
• Waterlogged pressure tank (for bladderless pressure tanks or for a pressure tank with a burst or leaky internal bladder)
  
  See WATER TANK AIR, HOW TO ADD
  or
  
  
  See WATER PUMP SHORT CYCLING
• Switch exposed to vibration, for example from a pump or due to poorly-secured piping.
  
  Isolate the pressure switch by using vibration-isolation mounts (available from plumbing suppliers).
  
  Also check that the pump mounts are in good condition and that the pump itself is not damaged.
  
  Excessive pump vibration may indicate a failing impeller or pump bearing.
  
  Reference: "Preventive Maintenance and Troubleshooting Guidelines for Class 9013F and 9013G Pressure Switches" (2007), Original source: Schneider Electric USA 8001 Knightdale Boulevard Knightdale, NC 27545 USA 1-888-SquareD (1-888-778-2733) www.us.SquareD.com

Chattering noises: in relays or switches used on HVAC equipment is discussed separately

at CHATTERING RELAYS, HVAC EQUIPMENT

CHATTERING RELAY CONTROL SWITCHES - home

Reader Question: My pump pressure control switch melted.

The repairman said it was due to bugs. Now my well pump is noisy. Did the pressure switch meltdown make my pump get loud? Can I replace it with a quieter pump?

I must confess that I don't know much about well systems.

Unfortunately, a well is where my water comes from for my house. I say unfortunately because it seems I’m always having problems and never had such hassles when having had city water.

The system is almost 10 years old and the upkeep seems to be constant and expensive.

Recently, one evening, while I was out of my house for a few hours, the system's pressure switch literally melted. I turned off the well system when I got home and waited 'till next morning to call the company who services the system.They came out and replaced the switch box.

They said it was likely caused by some bugs getting inside it which makes it malfunction.

I have been told to make sure to place moth balls around this box and to spray bug spray. They tell me this unfortunately is a common problem and that there doesn’t seem to be any remedy available. Well, this strikes me as an expensive situation.

Since the melt down and replacement, my system seems extra loud. Every time the pump goes on (I have a 7 gallon draw down) I can hear it all throughout the house and it’s especially loud in the room that the system is closest to. I doubt anyone could sleep in that room because of the noise.

I don’t remember the system being so loud before this happened.

Do you have any thoughts about this scenario? And do you know of any pumps (submersible) that are not loud, and do you know what they would cost?? - E., North Port FL

Reply: A shorted electrical circuit or switch might damage a pump; a damaged pump or a well with limited water capacity might lead to a burned-up the pressure control switch

A competent onsite inspection by an expert usually finds additional clues that help accurately diagnose a problem. That said, here are some things to consider:

• it's possible that the same conditions that caused the pump control switch to have a melt-down damaged the pump. Bugs in the switch are not the only possible cause of switch failure.
  
  Frequent pump cycling, burned switch contacts, improper switch adjustment, a pump or well that lost capacity to satisfy the cut-out pressure and left the pump running toolong, and other events could damage the pump switch.
• If one of those other conditions occurred as part or even all of the original problem, the pump may have been damaged not by the switch but by the event that showed up as a switch melt-down.
• signifcantly noisy well pumps may be due to a wearing bearing or damaged pump internal parts that move water - the impeller, as we discuss in the article above, beginning
  
  at PUMP NOISES, WATER & WELL
• even if the root problem was something peculiar to the pressure control switch itself, depending on how it failed it could have shorted pump wiring, potentially damaging the pump before the circuit breaker tripped or fuse blew.

It might be diagnostic to think back to

• what were the pressure control switch cut in and cut out pressure settings before the problme
• what problem signs had been observed about the well or the well pump such as short-cycling on and off frequently, hard stating, occasional loss of water pressure

You can replace a noisy above ground pump with a quieter model, and if your pump motor or the actual impeller assembly are loud due to damage or wear, it's a good time to think about that step.

If you convert an above-ground well pump to a submersible pump sysem you won't hear the pump motor at all, just a little click when the pump relay switch turns the pump on or off.

In fact you might notice previously masked (by pump noise) sounds of water entering the pressure tank.

Some typical well pump repair or replacement costs are discussed

at  WELL PUMP / TANK REPLACEMENT COSTS.

Question: Square D pressure switch clicking noise is too loud - how can we block the sound?

2016/08/27 Bill S. said:

We have a 35 foot deep well with a submersible pump. My question is how or what can be done to reduce the noise (loud click on and off. when the pump turns on or off.
Our basement has a guest bedroom and the noise wakes up our guests.

We have had the square D switch replaced once by our plumber, who said to get a quiet switch would be very expensive if he could find one? Note we have two bathrooms and a full lawn irrigation system, so the switch does work a lot in the summer months.

The loud on off sound is able to be noticed in our living room as well. This is a very solid custom built home. Do I need to put sound dreading material over the switch ? Thank You pbriverhs@mwt.net

This question was posted originally

at WATER PUMP PRESSURE CONTROL

Reply: Things to check for loud pressure switch noise causes & suggestions for sound-reduction at the pump room around the pressure tank and control switch

Bill:

Watch out: if your water pump pressure control switch is making a very loud bang, pop, or similar noise when the contacts open or close the switch may be damaged or unsafe, or the line voltage may be incorrect.

While a modest amount of spark or arcing at the pressure control switch is normal when the switch opens or closes, very loud noises or smoky arcing indicate that something more serious is happening.

I'd check the pressure control switch and water tank and plumbing in that area. Check at the pressure switch for:

• loose electrical connections,
• loose switch parts
• abnormal supply voltage,
• abnormal current draw from the water pump

• I'd check for abnormal movement in the plumbing pipes such as water pump torque that's banging inadequately supported welll pipes and transmitting that sound into the building.
• I'd also be sure that the noise is coming from the switch as opposed to a water hammer problem.
  
  See WATER HAMMER NOISE DIAGNOSE & CURE

If you and your electrician and plumber are dead certain that the pump control switch is acting normally but the sound remains annoying, then let's look at sound control for the pump room:

You might look at some sound insulation techniques -

see SOUND CONTROL in BUILDINGS at inspectapedia.com/BestPractices/Sound_Control_in_Buildings.php

and also SOUNDPROOFING MATERIAL PROPERTIES at inspectapedia.com/BestPractices/Soundproofing_Materials.php

But these switches are not normally very loud - to my hearing anyway. I'd look further at the switch mounting and location to see if its click is being amplified by a mount, sheet metal, tank contact or something that might be corrected.

I'd stay away from just wrapping the pump switch directly out of concern for

• forming a moisture trap that damages the switch or makes it unsafe
• forming a heat trap with the same effectsd
• Blocking access to the switch thus making more trouble when you need to inspect or maintain or repair that control

And I'd look instead at sound transmission between the pump room and the nearby areas.

See FLANKING SOUND CUTOFF at inspectapedia.com/BestPractices/Flanking_Sound_Transmission.php

See SOUND CONTROL for PLUMBING inspectapedia.com/BestPractices/Plumbing_Noise_Transmission.php

...

---

---

ADVERTISEMENT

---

---

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs

On 2020-10-08 by (mod) - immediately shut off an electric motor that hums but does not start

Anon

Watch out: If an electric motor such as a well pump is humming and not running

SHUT IT OFF IMMEDIATELY as the motor is unable to start, possibly seized, and there is risk of overheating, further damage, and even an electrical fire.

Then call for repair.

However if the pump is running and delivering water then the hum may be normal. Well pumps are not silent.

On 2020-10-08 y Anonymous

hearing a constant hum, is it my home well

On 2020-06-01 - by (mod) - when my pump turns on i get a loud vibration at my pressure tank and switch

Mike

Sometimes I hear a new vibration at the pressure tank and switch if air is entering the system - such as when the well is running dry.

A partly clogged inlet pipe can also cause such noises.

On 2020-06-01 by mike osborne

all of a sudden when my pump turns on i get a loud vibration at my pressure tank and switch

On 2020-04-14 - by (mod) - Water pressure switch keeps switching on and off?

Matt

Please take a look at this diagnostic article

WATER PUMP SHORT CYCLING CAUSES https://inspectapedia.com/water/Pump_Short_Cycle_Causes.php

and let me know if that helps you fix the trouble or let me know what questions remain

On 2020-04-14 by matt

Water pressure switch keeps switching on and off?

On 2020-03-21 by Anonymous - hearing a loud vibrating.

It's possible that you're hearing water movement in piping, or actual vibration from a well pump motor or control switch. To get further into diagnosing this noise you need to listen more closely to the well pump control switch and to determine if the pump itself is aboveground (where you can see and hear it) or rather is submersed in the well itself.

The short cycling of the sound could mean that a pressure tank is waterlogged. Search InspectApedia.com for

WELL PUMP SHORT CYCLING to read about diagnosing and fixing that problem.

On 2020-03-21 by Teresa

We live in a duplex apartment. We started hearing a loud vibrating.

(Sounds like someone using an big sander) sometimes it goes for several seconds and done for awhile or it stops and we hear the pump click. Sometimes it stops and then a second or two later does it again. It is winter out not sure if that contributes to it. Our duplex is out in country.

...

Continue reading at WATER PUMP PRESSURE CONTROL SWITCH CHATTER or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

Or see WATER PUMP PRESSURE SWITCH NOISE FAQs - questions & answers about noises at the pump pressure switch, posted originally at this page.

Or see these

Water or Well Pump Noise Articles

• CHATTERING RELAY CONTROL SWITCHES - home
• CHATTERING WATER PRESSURE CONTROL SWITCH
• ELECTRIC MOTOR NOISE DIAGNOSIS
• PLUMBING NOISE CHECKLIST
• WATER PUMP NOISE DIAGNOSIS - home
• WATER PUMP PRESSURE CONTROL SWITCH CHATTER
• WATER PUMP PRESSURE SWITCH NOISES - home
• WATER PUMP SHORT CYCLING - home
• WATER PUMP & TANK I&O & REPAIR MANUALS

Suggested citation for this web page

WATER PUMP PRESSURE SWITCH NOISES at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.

Or see this

INDEX to RELATED ARTICLES: ARTICLE INDEX to WATER SUPPLY, PUMPS TANKS WELLS

Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia

Ask a Question or Search InspectApedia

Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly.

Note: appearance of your Comment below may be delayed: if your comment contains an image, photograph, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. Apologies for the delay.

Only one image can be added per comment but you can post as many comments, and therefore images, as you like.
You will not receive a notification when a response to your question has been posted.
Please bookmark this page to make it easy for you to check back for our response.
Our Comment Box is provided by Countable Web Productions countable.ca

Citations & References

In addition to any citations in the article above, a full list is available on request.

---

ADVERTISEMENT

---