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  1. #1
    Join Date
    Mar 2010
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    SIT 820 Nova Mv Gas Valve Thermocouple

    OK guys, admittedly far froma pro. But i can change a therrmocouple.

    I have a 2004 Desa gas fireplace using the 820 gas valve above.

    Pilot will not stay lit and I replaced the thermopile as they are readily available.

    OK, will search for a thermocouple. Ended up with a Direct Vent Fireplace Fine Thermocouple SIT 820 NOVA. Well, it doesn't fit. I twill not thread int the valve as it's too large. It was also a copper tube type. The exisitng T/C is a white insulation over a copper wire with an 8mm coarse thread fitting at the valve and a 4mm temperature probe.

    Sounds simple right?
    Well, where in the world do I get one?

    I would never have thought that finding a thermocouple would turn into brain surgery!

    Any assistance would be greatly appreciated!

  2. #2
    Join Date
    Mar 2004
    Grottoes VA
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    It seems like you have an eye for detail, too bad you didn't read the rules of this site in more detail.
    Karst means cave. So, I search for caves.

  3. #3
    Join Date
    Aug 2004
    S.E. Pa
    Post Likes


    Thermocouples are mated to the pilot assy. and valve and therefore not interchangeable. You can drastically affect the dropout rate. Tinkering can void the warranty and listing.

    Hire a pro or leave it alone.

    As our resident cave hunter said, no DIY here.

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