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Retail dealersThermocouples for Martin gas heater model no au40ad/u40ag/uf40ag

Replacement thermocouples

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: Procom Model SN400TYLA Thermocoupler bad, can't find part

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Posted on Oct 28, 2008

protek480
  • 1714 Answers

SOURCE: Need a replacement thermocouple for my DynaGlo Pro

All thremocouples have a number on them which tells what 'millivolt' output it has. Try to match that up or call a HVAC company and ask them for one with that number.

Posted on Oct 05, 2009

rockmeister
  • 2047 Answers

SOURCE: parts for martin ind heater au40al how to replace

A thermocouple is a junction between two different metals that produces a voltage related to a temperature difference. Thermocouples are a widely used type of temperature sensor for measurement and control and can also be used to convert heat into electric power.
The following steps can be used to replace them

- Shut off the gas supply valve to the heater. The supply line connects to the thermostat at the bottom front of the tank. Turn the gas supply valve clockwise to shut it off.

- Remove the screws from the outer door at the bottom of the tank and remove it. The outer door covers the pilot tube, supply tube and the thermocouple connection.

- Remove the screws from the inner door located behind the outer door. If your heater allows, remove the inner door. If the inner door is an integral part of the burner assembly, leave the door on but leave the screws removed.

- Disconnect the pilot tube, supply tube and thermocouple from the thermostat. Use an adjustable wrench and turn all three nuts counterclockwise that hold the two tubes and the thermocouple onto the thermostat.

- Pull the burner assembly from the combustion chamber located behind the inner door. They could connect to the inner door as stated in Step 3.

- Remove the old thermocouple and replace it with the new thermocouple. The thermocouple attaches to the burner assembly in a bracket next to the pilot light. Pull and twist the old thermocouple from the bracket.

- Push and twist the new thermocouple into the bracket. Position the tip of the thermocouple where the pilot light flame heats the tip of the thermocouple.

- Replace the burner assembly into the combustion chamber and reattach the pilot tube, gas tube and new thermocouple to the thermostat.

- Reattach the inner and outer doors on the bottom of the tank and turn the gas supply valve back on. Do not forget to light the pilot light.
Hope this solution has been helpful?

Posted on Dec 03, 2010

emissionwiz
  • 75822 Answers

SOURCE: My name is Larry and I have an older model

The part is ordered by Model number, a serial number is no help, and yes there is a part called the flame sensor that allows the gas to stay on, I am sure if you contact a local supplier they can provide a suitable substitute gas valve or sensor if it is a stand alone part, on most the sensor is part of the gas valve. I think you will end up having a local shop try and match up the valve.

Posted on Dec 03, 2010

Therinnaiguy
  • 1420 Answers

SOURCE: I have a Sterling heater

ACE hardware, Tractor Supply, H Depot or Lowez should have what you need. Bring the old one with you. You may have to purchase one a bit longer, just keep the extra coiled up out of the way.

Posted on Mar 02, 2011

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1 Answer

I have a whrilpool water heater model fg1f404053nov replaced the thermocouple, stays lit for a couple of days and goes out....change out the gas vavle ???


Resources for Whirlpool/Craftmaster gas water heater:
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html

Problem might be diminished air supply or bad venting. Clean the air intake located on bottom of water heater using compressed air or feather duster. Air intake screen is series of openings as wide as razor blade and can easily clog.
Clean the combustion parts and burner. Bleed air/water out of gas line. Check gas pressure.
Check for pilot and venting issues on link above, including tight house, and other gas appliances and vent fans pulling draft down the water heater vent pipe, etc.
Also see service manuals for each type of gas control valve, and replacement steps for each type.

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1 Answer

My hot water heater will not stay lit once the pilot light I'd on and it is turned to the on position


Clogged air intake.
Bad gas control valve
Bad thermocouple.
Low gas pressure.
Tripped FV system because air intake clogged, causing overheated combustion chamber that may or may not require replacement parts including new gas control valve.
Call service technician, or copy following links for DIY resources.
http://waterheatertimer.org/How-to-repair-Rheem-FVIR.html
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html
http://waterheatertimer.org/How-to-replace-thermocouple.html

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1 Answer

How to replace thermocouple in 42v50-50f


Copy following link:
http://waterheatertimer.org/How-to-replace-thermocouple.html

Rheem 42V50-50 is ordinary atmospheric-vent gas water heater with mechanical (non-electronic) gas control valve, which says that unit has ordinary thermocouple, and not thermopile.
Buy generic thermocouple from local hardware.

To replace the thermocouple you need to remove entire burner assembly from water heater, and have replacement Burner access door gasket on hand. 1-800-268-6966
Combustion door held in place with tamper-proof screws

Since the water heater problem may be more complicated than just the thermocouple, and water heater flame arresor screen may need to be cleaned, and burner parts cleaned, door gasket replaced, and gas pressure checked, and piezo electrode checked, it might be best to have qualified service technician do the work for $300.

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1 Answer

Pilot light would not light but i could hear and smell gas coming out of pilot valve so i took off cover and cleaned it. It still would not light with the ignitor button so I did it manually and there is a...


sounds like the thermocouple:
The thermocouple is a safety device that turns off the gas if there is no pilot light. If you look closely at the burning pilot light, there is a small metal tube that sits directly in the flame, with wires that lead back to the gas valve. The thermocouple generates a small amount of electrical current when heated by the flame. This current keeps the gas safety valve open. If the pilot light gets blown out, the current stops and the gas valve closes. When you light the pilot light, you hold down the over-ride button for about 30 seconds. This allows the gas to flow long enough to heat up the thermocouple and generate current and then you can release the over-ride button and gas will continue to flow. If the thermocouple is defective, then as soon as you release the over-ride button, since there is no electrical current, the gas will stop flowing and the pilot light will go out.

This is a pretty common failure on water heaters and furnaces. Replacement of the thermocouple is fairly simple if you are the handyman type. If not, the thermocouple is a cheap part -- about $10 bucks, but the service call may run you $100 or so. Before you call a serviceman, get all of the brand and model information from the information plate on the heater so he can bring the proper replacement part. And sorry for your trouble. hope this helps:)

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1 Answer

I CAN LIGHT THE GAS WATER HEATER WITH THE RESET BUTTON BUT AS SOON AS I LET IT GO, THE PILOT LIGHT GOES BACK OUT.


The thermocouple is a safety device that turns off the gas if there is no pilot light. If you look closely at the burning pilot light, there is a small metal tube that sits directly in the flame, with wires that lead back to the gas valve. The thermocouple generates a small amount of electrical current when heated by the flame. This current keeps the gas safety valve open. If the pilot light gets blown out, the current stops and the gas valve closes. When you light the pilot light, you hold down the over-ride button for about 30 seconds. This allows the gas to flow long enough to heat up the thermocouple and generate current and then you can release the over-ride button and gas will continue to flow. If the thermocouple is defective, then as soon as you release the over-ride button, since there is no electrical current, the gas will stop flowing and the pilot light will go out.

This is a pretty common failure on water heaters and furnaces. Replacement of the thermocouple is fairly simple if you are the handyman type. If not, the thermocouple is a cheap part -- about $10 bucks, but the service call may run you $100 or so. Before you call a serviceman, get all of the brand and model information from the information plate on the heater so he can bring the proper replacement part. And sorry for your trouble. hope it's summer time where you are:)

Jul 26, 2011 | Water Heaters

1 Answer

Martin Gas Logs Model 18TCP Lost Flame including Pilot and will not relight. What could cause this?


if pilot is there when it is depressed in pilot mode then the thermocouple is bad.if no pilot gas check for inlet pressure to log set

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My name is Larry and I have an older model Vanguard natural gas wall heater. Igniter works and pilot lights, but pilot will not stay lit no matter how long I keep the control pushed down. As soon as I...


The part is ordered by Model number, a serial number is no help, and yes there is a part called the flame sensor that allows the gas to stay on, I am sure if you contact a local supplier they can provide a suitable substitute gas valve or sensor if it is a stand alone part, on most the sensor is part of the gas valve. I think you will end up having a local shop try and match up the valve.

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Sometimes when you turn a gas heater off for some time, if the source tank has been turned off, the line will bleed the propane and the line will contain mostly air. This is especially true if the supply line is long. In order to light the pilot, you will have to hold the pilot lighting button down for a while (a full minute or longer, depending on the size and length of the supply line) before pure propane arrives at the pilot light jet. You should keep a lighted lighter at the jet so that when the gas arrives, the lighter will light it. After the pilot lights, you will have to keep the button pressed long enough for the thermocouple to get hot enough to set the pilot to stay on. When it is hot enough, you should be able to release the pressed lighting button and the pilot should stay on. If it does, you should be able to light the heater. If the pilot jet never lights, gas is not getting to the regulator. If the pilot will not stay lit after a period of time waiting for it to heat the thermocouple, the thermocouple or the regulator may be bad and need replacement. :-)

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