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Home Improvement Stack Exchange

Questions tagged [thermocouple]

27 questions
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5 answers

Why does my pilot light keep going out?

My furnace pilot light keeps going out so I changed the thermocouple. Now the furnace will come on and heat up to the degree set on my thermostat, then the pilot light will go out and the furnace will not come back on. Could the thermostat be bad…
David Jabtecki
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pilot light does not stay on on gas burner after vacation

I was on a one month vacation but had kept the gas heater in normal mode (not vacation mode). Today I find my gas pilot light off. The cover was open for all this long. I tried to light it, but once I take my hand off the depressed pilot switch…
techcurious
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Gas pilot out and thermopile reads 600+mV, is it worth trying a new one?

Gas hot water furnace. Pilot won't stay lit, goes out as soon as you release the button even after 60+ seconds. The valve is a Robershaw 7000M8ERHC, with a Robertshaw 1951 thermopile. The thermopile document says it should produce 250 to 750mV. …
jay613
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Should a hole develop in the tip of a thermocouple after it is installed in a gas heater and lighted?

I just replaced the thermocouple in my gas heater as the pilot wouldn't stay on after lighting. The old thermocouple had developed a hole in the tip and the tip was discolored when I removed it. I checked the pilot today and it went off sometime…
F21
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Can I replace the thermopile with a thermocouple in my water heater, and have it work properly?

I'm having a tough time finding a thermopile at Home Depot, and lowes. I can find thermocouples all day long, and I can rig the wiring so I have no loose ends. However, I know those two units don't generate the same amount of power. If I swap to…
Papi Chulo
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What does it mean when my water heater gas valve seems to need too much current to operate?

My hot water heater stopped working, after testing the pilot light, thermopile, thermoswitch, pilot valve and main burner valve—all which are working well—I came to the conclusion that the board was dead. I have a WV8840B1117 (2013 board) Honeywell…
ShemSeger
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Replaced thermopile, pilot light works, fireplace still won’t light

I have an Empire VFSR-18 fireplace. The pilot light wouldn’t stay on so I replaced the thermopile and the thermocouple assembly. The pilot light stays on and my voltmeter is giving me 0.47V (470mV). I removed the switch and jumped the prongs and the…
KD1980
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Pilot won't stay lit after replacing thermocouple

The pilot won't stay lit on my furnace, when I release the button it just goes out. This started occurring after I did some gas plumbing and had to relight the pilot. I suspected the thermocouple and replaced it, but this didn't fix the problem. …
Hari S. Khalsa
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Pilot in gas water heater still goes out after replacing thermocouple

The pilot in my gas water heater (Aquamax 205) has been going out sporadically over the last 2 weeks. Yesterday, I replaced the thermocouple with a universal thermocouple and cleaned out the dust and soot from the burner area. After installation, I…
F21
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Thermocouple keep burning out, is it our gas valve?

Thermocouple keeps burning out. Looking at 1 or 2 within 2 week period ! Tried different brands, the pilot will only stay lit for 3 minutes then automatically shuts down.
Jenelle Carter
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Does the pilot flame of a gas furnace stay on for the duration of a heating cycle?

I was looking at my furnace a couple of days ago and I notice one thing: there is something red hot there where the spark igniter and the thermocouple assembly is. I can hardly see it and I am not sure what component is that but I was just wondering…
MiniMe
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Old Whirpool gas stove: thermocouples randomly stop working as soon as I put the lid on

Part 1: Old Whirpool gas stove mystically stops making spark when I put the cover on Well, few days ago I posted a question (see the link above) where I had a problem with getting spark when I put the lid on. After I solved the problem it started to…
Foby
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My Laars mighty therm won't keep a flame

I have a Laars mighty therm when I press the button to lite the pilot flame is on when I release it doesn't stay lit changed thermocouple twice heated the coupler for a while still nothing
Jaime Valentin
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Water heater pilot goes out after a burn cycle

Having the issue of having to relight the pilot after ever burn cycle. I cleaned the thermocouple, lit the pilot, and watched a burn cycle through the window. This is when I noticed something strange; when the burner lights it’s a strong flame that…
Michael K.
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Can a marginal transformer be responsible for random standing pilot light cutoff?

I have an old (late-50s era) forced-air furnace system with a standing pilot. Over the past few years it's started randomly shutting off (an audible click occurs as though the thermocouple has cooled and tripped it). I've replaced the thermocouple…
Joshua Nozzi
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