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Pilot light will not stay lit

Pilot light went out and now I can not get it to stay lit.  Solid blue flame when holding down the pilot light button but when it is released flame goes out. Start up instructions say to hold for a minute. Held it down for over two and still no luck. Do not know which part to replace.

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Re: 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

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Re: pilot light will not stay lit

Replace the thermocouple. It is cheap and relatively easy to replace.

Posted on Nov 02, 2007

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Re: pilot light will not stay lit

If you\'ve engulfed the last 3/4 to 1" of the tip of the thermocouple and it is glowing red and it still \'drops out\' when the button is released, the vast majority of times it is the thermocouple at fault. VERY RARELY it is the safety \'holding coil\' internal of the gas valve that receives the millivolts generated by the thermocouple to remain open....but it does happen.

You\'ll need a 3/8" wrench for the thermocouple connection into the gas valve and possibly a 7/16" endwrench for the pilot assembly end....sometimes they are only held in with a clip and will slip out easily from the bottom. Access to the pilot assembly on the unit heater you\'ve described is by removing two 5/16" captive screws on either side of the bottom front which allows the whole bottom of the heater to hinge downward exposing all of the ribbon burners and the pilot assembly.

If your pilot flame was weak and not keeping the tip of the thermocouple red hot, now is the time to remove the entire pilot assembly from the gas valve to the burner mount and blow out with an air compressor. The orifices inside the pilot are so tiny, you cannot generate enough pressure blowing with your lips to do any serious removal of dust, lint or foreign debris that may be partiallty restricting the pilot gas flow. If you feel the need to disassemble the pilot assembly totally, you\'ll need a 1/2" wrench to hold the assembly solid while undoing the aluminum pilot tubing with the 7/17" wrench. When disassembled, tap the back end of the assembly and the tiny pilot orifice SHOULD drop out unless it is the larger type that actually screws into the assembly. Resist the urge to use a needle or pin to ream out the openings, you will render it useless and a new assembly will have to be purchased. Use the air compressor or keyboard cleaner if no compressed air is available.

Posted on Jan 10, 2015

Re: pilot light will not stay lit

I am having the same problem. Everthing that I have read sugests replacing the Thermocouple.

Posted on Dec 30, 2007

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My pilot light won't stay light

Most often, this is a faulty thermocouple. Replace it, but first be sure the pilot flame is actually heating the thermocouple. If it is not, it will not stay lit. Sometimes they fall down out of it's holding bracket or just go bad. A lazy yellow pilot flame means the pilot orifice is dirty and needs to be cleaned. If the pilot flame is a string blue color, then replace the thermocouple.

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Cannot get pilot lit burns blue flame but goes out

The best approach first would be to blow out the dust. There are one to two breather ports that easily get clogged. If that doesn't work it may be a bad thermocouple. It can be checked with a volt meter set to multicolored. Disconnect the thermocouple from the valve and attach the black lead to the thermocouple itself and the red to only the tip that makes contact inside the valve. Light the pilot and hold in button to begin watching the readings. 18-24 millivolts is the desired range.

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Pilot turns on but when I switch to turn it on,

When you light the pilot, are you holding it down for 30-60 seconds. When you release the pilot button, does the pilot flame stay lit? Or does it only go out when you turn the knob to on position. Make sure the pilot flame is heating the end of the thermocouple and that it's a strong blue flame, not a lazy yellow pilot flame. Make sure the tip of the thermocouple is not burn't off, which usually happens with lazy yellow pilot flames. Replace thermocouple is nothing else works.

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Pilot will not stay lit and heater will not light

thermocouple probablly bad, is the flame covering the thermocouple.
the flame has to hit top portion of thermocouple to work correctlly.

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Not sure how to relight the pilot light. Some point during the night it just went off. Not sure how or why that happened either. I have tried to do a few things but need help

To light your pilot you will need to find the gas valve assembly. It will be a block of aluminum with a plastic knob and a few pipes attached to it. Once you find it, rotate the knob to the pilot marking on the knob. You will know when you are at the proper setting because you will be able to depress the knob into the gas valve about 3/8". Once you do that, there will be a small red button which you can snap causing a spark at the pilot. There may ba a small viewing port covered by a removable metal shield. OK, Depress and hold in the knob, snap the red button a few times. Keep holding the knob in, look into the viewing port for a blue flame. If no flame, snap the button a few more times looking for a spark. Once you see the flame stop snapping but continue to hold the knob in. Count to 30. Slowly let the knob out watching that the flame stays on. If it starts to go out, quickly depress the knob and hold for a minute. If it continues to go out, you have a bad thermocouple and it is not letting the pilot stay lit. If it stays lit, rotate the knob to On. A few seconds later and if the unit is calling for heat, it should light the main burner. If you need a new thermocouple, go to a good hardware store or Farm Center (bring the old part with you) and ask for a new one.

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If the pilot light goes out when you release the primer,then the thermocouple is bad.You can try to adjust the thermocouple,if it can be.It needs to be in the pilot flame.If the thermocouple is not in the flame,it will not stay lit.If you can not get the pilot to light at all,with the primer pushed down,then replace the regulator.To light the pilot light,you need to turn the dial to pilot.Then press the primer button down and hold it.The primer is either built into the turn knob,or it is a res button.Hold the primer down,and light the pilot,continue holding the primer down for at least 40 seconds.Then release the primer slowly,and if the pilot light starts to get weak,and try to go out,then push back down,and hold 30 seconds more.After the pilot stays lit,turn the knob to furnace or low,or whatever the directions say.

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Cannot get my pilot to stay lit

Make sure the thermocoupler is about 1/4 in in the flame of pilot. If it persists, as you say it is, the thermocoupler is defefective. It's that bulb in the pilot flame. Good Luck, Ned

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1 Answer

Pilot lite will not stay lite

You need to change the thermocouple on the unit.


First check to see if the flame is hitting the thermocouple when the flame is on when you hold down the button. If it is then remove the the thermocouple and replace with the same size. You should be able to pick one up at your local hardware store.

If when you replace the thermocouple the flame does not stay lit still you may have a bad gas valve.
Hope this helps and please rate this!

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