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Pilot on furnace wont stay lit

Pilot lights but wont stay lit

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Sounds like the thermocouple is shot

Posted on Nov 09, 2014

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Posted on Jan 02, 2017

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SOURCE: pilot light will not stay lit

Clean the pliot light tube with a Q-Tip and alcohol. Clean 2 inches deep. This will increase the pilot light flame and it will heat up the thermocoupler so it will stay lit.

Posted on Dec 06, 2008

  • 1214 Answers

SOURCE: pilot wont stay lit installed new gas valve and new thermocouple

Is this a standing pilot furnace, or electronic igniton?

If standing pilot, does the heater use a fan to blow air through the heat exchanger?

If the answer to those questions is yes, then check that the pilot orifice is not partially plugged and that there is a strong pilot blowing against the thermocouple. If there is, replace the thermocouple. If not, check the orifice again, and check that the inlet screen to the gas valve is not filled with gas line trash.

If the the pilot flame is good and it continues to go out, the thermocouple magnet in the gas valve may be weak. Replace the gas valve as to get just the magnet and coil is not easy.

Reply back any questions you may have.

Posted on Jan 28, 2009

  • 127 Answers

SOURCE: pilot light on dayton gas heater model 3e469 wont

chech the flame sensor or thermocouple which ever it is equipt with. Sensors can be cleaned by lightly sanding them and therocoulpe's need to be replaced.

Posted on Oct 28, 2011

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1 Answer

Pilot light wont light


Rita, Check the attached links,instruction and guides to trouble shoot pilot light, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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I AM WORKING ON A COZY W501E WALL FURNACE AND CANT GET THE PILOT TO STAY LIT. i HAVE CHANGED THE GAS VALVE, THERMOCOUPLE,AND THE SENSOR FOR THE HIGH LIMIT. THE PILOT WONT STAY LIT.


Pretty much the only thing that will do that is the thermocouple not generating enough voltage for the valve to say it's OK.
Usually you need to hold the button for pilot lighting for 60 seconds. You can use a meter to check that it's generating enough power. The thermocouple has to be in the pilot flame properly.

Check this video:
https://www.youtube.com/watch?v=suen7QlJl4o

Gas furnace will not light Thermocouple test with the multimeter

Or see this site:
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You have one of three things here
1. Dirty pilot, needs to be cleaned.
2. Bad thermocouple needs to be changed and pilot assembly cleaned.
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Nov 09, 2014 | Heating & Cooling

1 Answer

Pilot light on Tempstar furnace wont stay lit. replaced thermo-couple and it still wont stay lit. what next???


Do you have a good pilot flame? Is it wrapping around the thermocouple good? You may need a new pilot orifice.

Mar 07, 2014 | Heating & Cooling

1 Answer

When I tried to light my furnace, the electrical wires from the thermostat don't spark all the time, therefore my furnace won't stay lighted. What can I do to fix this?


Is this an older furnace where you have a pilot light? Are you saying the pilot light will not stay lit? If thats the case then likely you need a new thermal couple. That is what the pilot light keeps hot while it stays lit. It is a safety device that is there so your furnace will not come on if there is no pilot light present. Very common. Hardware store item. Need Furnace's make and model #'s.
If this is an electronically controlled furnace, you will need a service call.

Jan 13, 2012 | Heating & Cooling

1 Answer

The pilot light will stay lit. Go to turn on heater and stays on briefly and goes out The heater wont stay lit.


If the fan comes on and blows out the pilot light then you need a new furnace because that's the sign of a crack in the heat exchanger. Need a little better description. Do the burners light then the fan come`s on and then it goes out completely?

Nov 24, 2010 | Heating & Cooling

1 Answer

My pilot light wont stay lit


Hi try cleaning the pilot light out make sure the thermo couple is in the flame,check where the tcouple goes in to the valve nothing stuck in there try this it could be the valve not working

Feb 07, 2010 | Heating & Cooling

1 Answer

I can't get the pilot light on my furnace to stay lit.


take out the pilot assembly. there is a small burner and an orfice. the orfice does get clogged if it has not been operated for awhile. you can clean it out with a small sewing needle. if the pilot wont light or stay lit, replace the thermocouple.

Dec 06, 2009 | Heating & Cooling

1 Answer

Pilot light wont stay lit.want to clean the orifice


You shut off the gas.
Shut off the power.
Remove the gas valve and burner assembly.
After cleaning and reassembly you must purge the system and use a gas leak detecting soap to verify no leaks before turning on the power.

Apr 15, 2009 | Heating & Cooling

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