Questions tagged [thermocouple]

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Replacement part for bradford water heater thermocouple

I have a bradford water heater and I am trying to replace the thermocouple. After getting it out, it looks like I can't just replace the thermo but I have to replace a full assembly. The thermo has ...
Raymond Holguin's user avatar
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1 answer
63 views

Diagnosing water heater - can I apply voltage to a thermocouple?

American Water Heater BFG6140S403NOV I am troubleshooting this water heater. The pilot light won't stay on and I suspect it is the thermocouple. I measured the voltage while running the pilot ...
John Smith's user avatar
4 votes
1 answer
537 views

How can I wire a thermocouple to monitor wood stove catalytic converter?

Many modern wood stoves (wood space-heaters, actually) use a catalytic converter to dramatically increase efficiency and dramatically reduce pollution. It's important for users to monitor the ...
RustyShackleford's user avatar
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16 views

Trying to control my heating recirc pump Aplha1L Grundfos, with a signal from thermocouple. What connections are used on the pump to connect stat

I can run the system on manually and it works fine but I don't know how to connect the thermocouple to the pump so it's turned on when water hits a certain temperature and gets off when the ...
Luci-fur's user avatar
4 votes
1 answer
523 views

New Thermostat displaying inaccurate for outdoor temperature sensor

I installed a new Honeywell TH8321WF1001 thermostat to replace a Carrier programmable thermostat. This is a dual fuel Carrier system (heat pump with gas backup). The new HW stat is working fine ...
Patrick's user avatar
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3 votes
4 answers
2k views

Natural gas fireplace with included "smart" thermostat and DIY added "dumb" thermostat as a power outage failsafe [closed]

I'm seeking a fireplace that can have two thermostats installed in parallel, a "smart" thermostat that requires power and a "dumb" mechanical thermostat that allows the fireplace ...
MacGuffin's user avatar
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0 answers
148 views

What are these fireplace features and parts called?

I had my old fireplace damaged in a storm which resulted in its hasty removal and an ugly patch to cover the hole. I've been shopping for a replacement off and on since but it seems I'm running into ...
MacGuffin's user avatar
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1 vote
1 answer
121 views

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 ...
ShemSeger's user avatar
  • 365
1 vote
0 answers
251 views

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 ...
KD1980's user avatar
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0 answers
40 views

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 ...
Foby's user avatar
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3 answers
638 views

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 ...
jay613's user avatar
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98 views

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's user avatar
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0 answers
966 views

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; ...
Michael K.'s user avatar
-1 votes
1 answer
368 views

Problem with my Mendota Seabrook Model D-30 Direct Vent Gas Insert

I have a Mendota Seabrook Model D-30 Gas Fireplace that keeps shutting off, sometimes after 1 minutes other times after 10 minutes. It has been running fine for about 9 years, but then started having ...
Sam's user avatar
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2 answers
178 views

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 ...
Joshua Nozzi's user avatar
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0 answers
39 views

Fireplace - Pilot stays on, fire goes off

Trying to figure what is wrong with my gas fireplace. I tried to start it few days ago first time since last winter, I brushed the thermocouple, thermopile and the burner, also used compressed air ...
George's user avatar
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1 answer
771 views

Millivolt fireplace turns on by the thermostat but will not shutoff

I inherited a freestanding direct vent fireplace and I'm trying to get it to work with a thermostat. It functions fine using the ON/OFF/PILOT switch but will not work with a thermostat. It is a SIT ...
Landoperk's user avatar
0 votes
1 answer
840 views

How to test water-heater thermocouple?

So I took out Kenmore Power Miser 9 burner assembly and want to root cause why the pilot light kept going off whenever I released the RESET button during ignition procedure. Here is the test I did: ...
user2138912's user avatar
0 votes
2 answers
7k views

Can a pilot on a furnace be on but the thermocouple still be bad?

Heat just stopped working after working 3 days ago. All circuit breakers are looking good, gas is flowing, and furnace seems to be operating fine. Pilot is on and thermocouple is holding the flame, ...
dama_do_bling's user avatar
0 votes
2 answers
3k views

Fireplace sensor that is not a thermocouple or a thermopile

My MB42 fireplace with digital fireplace burner control (SIT Proflame) will not stay on after starting. It shuts off many times, and only on a 6th try or so, will stay on. The controller has a single ...
Bram's user avatar
  • 517
1 vote
1 answer
32k views

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 ...
Hari S. Khalsa's user avatar
0 votes
3 answers
45k views

Gas fireplace flame won't stay on; both flame and pilot go out

I have a Charmglow 300TQ unvented gas fireplace. It worked beautifully until I had the 100 lb bottled gas tank refilled three days ago. I am now having two problems, which I imagine are related: 1) ...
Lizzie Mills's user avatar
0 votes
2 answers
12k views

Water heater pilot light always goes out during the night

I have an AquaMax 205 water heater. Recently the pilot started going out, so I replaced the thermocouple and cleaned the burner. After replacing the thermocouple, the pilot would go out sometime ...
F21's user avatar
  • 165
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0 answers
21 views

Heater pilot problem

My heater pilot light goes on and then off not sure why if does that, the gas goes on and then fan but only for seconds then off including the pilot.
Arthur's user avatar
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0 votes
3 answers
4k views

Thermocouple measured okay, but replacing it fixed the problem?

So the pilot on my furnace wouldn't stay lit. I tested the thermocouple with my multimeter and got 29 millivolts which meant it was still working. Assuming I was in over my head, I called the plumber ...
user6591's user avatar
  • 191
1 vote
2 answers
52k views

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 ...
F21's user avatar
  • 165
2 votes
1 answer
1k views

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 ...
F21's user avatar
  • 165
0 votes
3 answers
20k views

Can I use a Honeywell thermocouple in a State water heater?

I have a State water heater that's around 13 years old. About a month ago, the pilot light went out randomly and I was able to relight it with no problems. A couple of days ago, the light went out ...
J. Lin's user avatar
  • 151
2 votes
1 answer
2k views

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 ...
techcurious's user avatar
1 vote
2 answers
5k views

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 ...
Papi Chulo's user avatar
0 votes
1 answer
5k views

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's user avatar
-1 votes
3 answers
307 views

Thermocouple with a built in safety overtemp disc verses a standard universal T/C? [closed]

My water heater has a thermocouple with an in line overtemp disc stamped 190. The pilot will not stay on after holding the gas valve's pilot start button. So, i assumed like every other water heater i ...
user avatar
0 votes
1 answer
8k views

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 ...
MiniMe's user avatar
  • 3,402
4 votes
5 answers
178k views

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 ...
David Jabtecki's user avatar