One thermostat works, the other doesn't

Discussion in 'HVAC' started by churley702, Nov 21, 2006.

  1. Nov 21, 2006 #1

    churley702

    churley702

    churley702

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    Hi,

    I recently moved into a new apartment. I have one thermostat on the first floor and one thermostat on the second floor. At first, both thermostats worked, but now only the second floor thermostat works. I purchased a new thermostat and installed it on the first floor, but no luck. To make sure I purchased I working thermostat, I installed it on the second floor and it works. I don't know what it could be. Any suggestions??? And how much might this cost to get fixed??? Thanks!!!
     
  2. Nov 22, 2006 #2

    glennjanie

    glennjanie

    glennjanie

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    Hi Churley:
    Thermostats work on a 24v system. You may have a burned out transformer or your heater may have a burned out contactor. Has the contactor been making a buzzing noise while the unit runs lately? That would be a good indicator of a burn out.
    If these two attempts fail, you will need to trace the entire 24v system to find the trouble; could be a wire broken or an in-line fuse blown, etc.
    Let us know how it turns out.
    Glenn
     

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