Lenox / Marco Gas Fireplace - Fault Thermopile / Thermocouple


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Old 01-25-18, 10:27 PM
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Lenox / Marco Gas Fireplace - Fault Thermopile / Thermocouple

Pilot light went out. With the pilot button pressed, I can light the pilot (blue flame) for as long as I hold the button. As soon as I depress (even after waiting 1 1/2 minutes), it immediately goes out. I am assuming thermocouple. I believe I identified the correct manual but I cannot determine model # other than 26" thermocouple. Are there different "types"?

https://www.fire-parts.com/pages/man...36_install-pdf
 
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Old 01-25-18, 11:34 PM
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That's not a thermocouple.....it's a thermopile or pilot generator or millivolt generator. It generates voltage to operate the pilot and the main burner valves.

Basically they all do the same thing. The cheapies sometimes don't last or don't produce enough voltage. This one should be fine. There is also a Honeywell at the bottom of the page that should be an excellent performer.

White-Rodgers-Emerson-3101-Millivolt-Generator/dp/B00062AZMA
 
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Old 01-26-18, 06:52 AM
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Are the thermpiles standard? Local company said they would have to 'order the part'.

The manual says 26" but the link doesn't specify length. Is 26" a standard length? Is there any concern with the fitting? Is that standard? Would this be plug-n-play? Follow the wires to the source and there should be 2 screws for each terminal?
 

Last edited by sagosto63; 01-26-18 at 07:21 AM.
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Old 01-26-18, 04:41 PM
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The 26" is only referring to the length of the leads.
Plug and play... yes.
There should be a screw terminal for each lead. The generator cable will have a heat resistant covering. The wires come out and usually have crimped-on lugs to fit screw terminals.

I use universal pilot generators. I've never had a problem.
 
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Old 01-27-18, 01:20 PM
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Thanks. I got quotes up $200 for a replacement and it sounds like I can do this myself.
 
 

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