heat pump thermostat...

Discussion in 'HVAC Heating & Cooling' started by chris fox, Jul 18, 2007.

  1. chris fox

    chris fox New Member

    Messages:
    150
    Location:
    near phoenix AZ
    Hi all,

    I am usually over at the shower/tub section but I have an issue with my heatpump/AC system/thermostat. It runs cuts off for about 3 minutes(depending on time of day) and kicks back on. This startup cycle has got to be killing my wallet!

    I had this condenser replaced 1.5 years ago the air handler is original. I have two 3 ton systems for my 1995 track Arizona home. Yes, its hot but the other unit runs longer but stays off longer too.
    Is this a thermostat issue. I read the setup instructions and couldnt find any faults during the setup. I do have the thermostat set on "hold" it is a programmable themostat but my wife is a stay at home mom so no programmable schedule for cost savings.

    Any ideas before I have to make my service call?

    thanks,
    Chris
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,933
    Location:
    New England
    This is not my area, but could it be the high pressure cutout? Or, a thermal overload? Read the user info for troubleshooting to see what if anything, has a timer on it.

    Often, you can hear the thermostat activating or see the status on the display. Is it turning on and off, or is it continuously calling for the a/c function? If the compressor is operating as the thermostat asks, it may not be the a/c unit.
  3. chris fox

    chris fox New Member

    Messages:
    150
    Location:
    near phoenix AZ
    A typical scenario is a "click" heard at the thermostat then the air handler and condenser simutanously.
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