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Why Does My Pilot Light Go Out When I Release the Pilot Light Knob?

FAQs william August 11, 2022

If you can ignite the pilot light, but it goes out when you release the control button, the thermocouple probably needs to be replaced. The thermocouple is a safety device that shuts off gas flow when it detects the pilot light is out, but if damaged it loses its ability to regulate.

Why does my pilot light keep turning off?

A faulty, misaligned, dirty or damaged thermocouple is often the cause of your pilot light going out. The thermocouple is an automatic safety shut-off device that prevents the gas valve from opening when the pilot light is out.

How do you fix a pilot light that won’t stay lit?

A faulty, misaligned, dirty or damaged thermocouple is often the cause of your pilot light going out. The thermocouple is an automatic safety shut-off device that prevents the gas valve from opening when the pilot light is out.

Why does my pilot light keep going out after replacing thermocouple?

If the pilot light comes on but goes out after it reaches temperature, it’s the control valve. it happened to me After the plumber replaces the control valve, it stays lit. You must order the control valve from the manufacturer.

Why will my pilot light not stay lit on my water heater?

If the indicator light on a water heater goes off, it usually means that the thermocouple is defective. Thermocouples are small electrical generators that create a magnetic current that keeps a magnetic gas valve open in the control unit on the front of the water heater.

How do I know if my thermocouple is broken?

After about a minute, when you are sure the probe has gotten hot, place one lead on the thermocouple shaft and the other lead on the terminal. If the reading is less than 25 millivolts, the thermocouple is defective and must be replaced.

Will a bad gas valve cause pilot light to go out?

The pilot light depends on a reliable gas or propane source to stay lit. Any problem with the gas valve that supplies this gas to the flame, whether dirty or defective, can cause the flame to go out.

How do I clean my thermocouple?

Remove the thermocouple from the process assembly, use a steel wool or emery cloth, lightly clean the tip and remove debris. Cleaning a thermocouple does not solve a problem such as B. inaccurate readings.

How much does it cost to replace a thermocouple?

Thermocouple – ​​$20 to $150

The thermocouple is a device that detects when the pilot light is lit and triggers the gas control valve. Repairs typically cost around $150 when done professionally, although a new thermocouple itself is only around $20 on average.

How much does it cost to replace a thermocouple on a furnace?

Replacing a thermocouple costs $150 to $250, mainly due to labor. On older models without an igniter, it checks to see if your pilot light is lit. If this is not the case, the gas is turned off.

How do you reset a thermal switch?

Replacing a thermocouple costs $150 to $250, mainly due to labor. On older models without an igniter, it checks to see if your pilot light is lit. If this is not the case, the gas is turned off.

How do I know if the thermocouple is bad on my water heater?

If the pilot light ignites, but the flame goes out when you release the button after holding it for 60 seconds, then the thermocouple is defective. It is possible to replace the thermocouple without removing the burner assembly, and many repair people do it.

What causes a thermocouple to go bad?

The presence of oxygen causes a reaction in the thermocouple that can wear out the part and make the wires thinner and more brittle. Oxidation can be caused by a small amount of oxygen getting into an enclosed environment and reacting with the bare metal of the thermocouple.

How do you clean a thermocouple on a furnace?

The presence of oxygen causes a reaction in the thermocouple that can wear out the part and make the wires thinner and more brittle. Oxidation can be caused by a small amount of oxygen getting into an enclosed environment and reacting with the bare metal of the thermocouple.

Does gas still flow when pilot light goes out?

If your check engine light goes out repeatedly, this is probably the cause. Should this flame sensor fail, gas will continue to flow even after the pilot flame has gone out, posing a safety hazard and requiring immediate repair.

References:

  1. https://www.supertechhvac.com/pilot-light-keeps-going-out/
  2. https://www.youtube.com/watch?v=PiCmfW1rTRY
  3. https://diy.stackexchange.com/questions/104199/pilot-in-gas-water-heater-still-goes-out-after-replacing-thermocouple
  4. https://www.rotorooter.com/frequently-asked-questions/water-heaters/why-is-my-water-heater-pilot-light-not-staying-lit/
  5. https://www.hunker.com/13407415/how-to-tell-if-a-thermocouple-is-bad
  6. https://www.logan-inc.com/blog/article/what-causes-pilot-light-go-out
  7. https://www.pyrosales.com.au/blog/thermocouple-information/can-you-clean-a-thermocouple/
  8. https://www.carrollplumbingva.com/water-heater-repair-service-costs-guide/
  9. https://www.homeadvisor.com/cost/heating-and-cooling/repair-a-furnace/
  10. https://www.youtube.com/watch?v=HlvCMzHX0KQ
  11. https://www.familyhandyman.com/project/hot-water-problems-restore-it-yourself/
  12. https://www.geocorpinc.com/news/archive/causes-of-thermocouple-failure-part-1/
  13. https://www.youtube.com/watch?v=3EKbSiAJyiI
  14. https://www.ricksheatingandcooling.com/blog/what-to-do-if-pilot-light-goes-out

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