Thermopile removal, gas fireplace.


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Old 01-16-16, 09:38 AM
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Thermopile removal, gas fireplace.

I have a Heat-n-Glo vented gas fireplace. Model 6000TRB. The pilot lights ok and stays on, but when I hit the wall switch, the fire will not light. I have isolated the problem to the thermopile (thru testing) but can not see how to remove it from the bottom in order to replace it. How can I get it out? I have the manual, but there are no instructions on replacing parts. Not much room to work with underneath. Thanks
 
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Old 01-16-16, 10:04 AM
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Welcome to the forums.

That repair will probably require you to take the inside apart.... the logs, etc. There is next to no room to work under the burner.
 
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Old 01-16-16, 11:55 AM
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It is much more likely that the pilot burner needs to be cleaned than that the pilot generator needs to be replaced.

The pilot burner flame should look like a small blue blow torch with a sharp flame that engulfs the pilot generator.

If the pilot has a soft flame that is easily blown around like a candle flame, perhaps having yellow tips or not engulfing the thermocouple, the pilot burner needs cleaning.

A simple and sloppy way of cleaning the pilot burner is to shut off the pilot flame and let the pilot burner cool. Use a straw to blow air down the throat of the pilot burner and see if that solves the problem --- for a while, anyway.

Doing a good job involves disassembling the pilot burner and cleaning or replacing the pilot orifice.
 
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Old 01-16-16, 11:58 AM
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Doing a good job involves disassembling the pilot burner and cleaning or replacing the pilot orifice.
Thanks for addressing the pilot flame issue.

You're right.... these fireplaces need a very strong burning pilot light.
Mine is like a miniature blow torch.
 
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Old 01-16-16, 12:04 PM
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Microvolts too low to operate the gas valve most often involve a dirty pilot --- with a wall switch not making a good electrical circuit being in second place as a cause.

It was actually fairly rare that I found that the thermopile needed to be replaced.


Man--- I pulled out a LOT of wall switches that has high milivolt losses through them!

Of course most wall switches are designed for 1230 VAC operation, not to switch milivolts on and off.
 
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Old 01-17-16, 11:48 AM
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SeattlePioneer; Thanks for the help. Novice at this,(gas fireplaces) so be patient with me. I'm fairly mechanical though and like to fix things on my own where I can. When you refer to the "pilot generator', what is that? And, where is the 'pilot orifice' located? My main problem is that I can not see how to access the pilot assembly. Do I have to remove everything on the inside of the fireplace to get to it? Thanks again.
 
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Old 01-17-16, 12:09 PM
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Your insert has two devices... a thermocouple that sits in the pilot flame and holds the pilot valve open. Then there is the pilot generator/thermopile that also sits in the pilot flame and generates the voltage to open the main gas valve. They both rely on a good pilot flame.

In the following link.... is the manual for your unit. Illustration/figure 32 illustrates the above.
hearthnhome/installManuals/389_901.pdf

I'm not sure exactly where the orifice is. That is the pilot assy in the middle and the orifice will be under that hood.

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