Another thermostat Question.

Discussion in 'HVAC' started by house92, Jan 21, 2013.

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  1. Jan 21, 2013 #1

    house92

    house92

    house92

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    I have the old mercury thermostat and recently had an issue with my propane HVAC. I had the furnace repaired. I've recently noticed my system has a cycle of staying off longer every so often. I first notice the other day when i thought things seemed a bit chilly. I looked, and the temperature was below the usual by a few degrees; however, it kicked on shortly thereafter. It runs normal cycles for a while afterwards. I would estimate 2 of these longer cycles in a days time. What could be causing this?
     
  2. Jan 22, 2013 #2

    kok328

    kok328

    kok328

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    Depending on the type of T-stat that you have it could be the anticipator (for a mercury style t-stat) or offset/differential (for a digital style t-stat).
     
  3. Jan 22, 2013 #3

    Wuzzat?

    Wuzzat?

    Wuzzat?

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    An intermittent problem caused by the repair? Or this has just started due to coincidence.

    See if you can bring on the fault somehow.

    Or if you can get a hold of a scrap mercury 'stat you can make a simple alarm circuit for an early warning of this problem.
     

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