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My thermocouples only last for about 6 mos. at least the furnace will not stay lit with them? This is an older model possibly the 70s?

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  • mthesen2 Sep 15, 2008

    these thermocouples last 6 months at the longest and this is in a furnace ,nothing to do with an a.c.unit The heating furnace is from the 70s or maybe 80s
    pilot goes out and can not be relit until I change thermocouple?

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Basically the heavier gauge copper wire the longer they will last... are they exact replacements for the original thermocouple and you are following the correct replacement procedure i presume. sheathing on the wires of course will make them last longer as well.

as the furnace is that old i'm uncertain that you are able to get an original replacement. be that as it may if you can, find the specifications on it and find a good replacement and more durable replacement.


Robert

Posted on Sep 15, 2008

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Sound like air flow problem to me, the inside and the outside. check the inside filter to see if it's clean and clean the outside condenser coils by washing it.

Posted on Sep 15, 2008

  • Legin Varghese
    Legin Varghese Sep 15, 2008

    I am thinking more along the lines that you have a restriction
    somewhere in the condenser sheet coil, or the condenser line coming
    from the compressor. If you have no suction pressure this would explain
    a restriction.I would check filters if you have them installed.

    On a side note the pressure of refrigerants change due to the increase
    and decrease in temperature. So depending on the temperature would
    determine the pressure of the refrigirant.

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