Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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GAS FIREPLACE Used the gas fireplace, Majestic, for 5 seasons and now it just won't stay lit. Just had our furnace inspected and tuned up and had the service man check out the fireplace. He believes it could be the valve, a honeywell that I have heard bad things about from various sources. Should I first replace the thermopiles before moving on or is there something else?

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  • Philo Cleigh
    Philo Cleigh May 11, 2010

    Does your fireplace have a standing pilot ignition system with two separate thermo-electric devices? A thermocouple and a thermopile?

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Yes, hopefully changing the thermocouple (skinny sensor) or thermopile(fat sensor) would do the trick.
Start with these fairly inexpensive repairs first.
Unfortunately if the honeywell valve is bad a new one can be expensive.
Also it is hard to order parts from Majestic, they just went bankrupt, not to long ago and Martin is taking them over. You might look for your valves model# and check online for other suppliers of that model# or ask for a compatible Direct Vent gas valve that's not as problematic. (eBay and HVAC dealers, etc.)
FYI:
You said it's been about 5 years, you might decide it's less of a hassle to have new gas fireplace installed. Martin and Empire are probably two of the best, with 5 year parts and labor warrantys.
Hope you find some success in your endeavor.

Posted on Apr 11, 2009

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  • Honeywell Master
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Yes replace them and try cleaning the pilot first

Posted on Jan 22, 2010

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