either fan or ac unit works

Discussion in 'HVAC Heating & Cooling' started by Chewey, Jul 3, 2008.

  1. Chewey

    Chewey New Member

    Jul 3, 2008
    I've some threads with some of these problems listed but not like this.

    I turn on the ac, fan on auto. The ac unit runs but no fan. I put the fan to the on position and it runs but the ac turns off. It's one or the other. The air is cold when it get blown in but then warms as the ac turns off. It seem to be the same with the heat. Is a capasitor too weak to jump the whole sysem on?
  2. Furd

    Furd Engineer

    Jul 3, 2007
    Retired energy systems engineer
    Wet side of Washington State
    Have you recently changed the thermostat?
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    Unless the AC stops immediately, it is harvesting the latent cold air in the unit, and that will get warmer as all the cooling is extracted.
  5. Bill Arden

    Bill Arden Computer Programmer

    Sep 30, 2006
    computer programmer
    MN, USA

    It sounds like the temperature sensor on the indoor unit is not turning on the fan.
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