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Air conditioner power consumption and temperature setting

Discussion in 'Electronic Basics' started by Pascal Damian, Oct 11, 2004.

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  1. The sales rep that sold me AC told me that my AC unit will consume
    about 1400W when starting up, then 700W *constantly* regardless of
    temperature setting (e.g. 20C vs 25C). Is that true? I'm guessing not,
    but I'm not sure.

    Pascal Damian
  2. I would expect it to consume 700W _while running_, regardless of the
    thermostat setting. If it produces enough cooling to bring the room
    temperature below the thermostat setting, then it will turn off, and
    consume no power, until the temperature rises enough for it to

    The higher you set the thermostat, the less cooling it will have to
    do, so it will run for a smaller percentage of the time, and so the
    average power consumption will be lower.

    Peter Bennett, VE7CEI
    peterbb4 (at)
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  3. I am not sure of this, but I would expect higher power consumption on
    warmer days since more work has to be done on the gas. It will
    certainly use more power on average because the machine will run more
    hours to cool the house.

  4. But what is the definition of "running"? If I turn the unit on (press
    ON on the remote control) and set it to Cooling mode, then a blue LED
    will light all the time. However, from time to time another orange LED
    will light for a while and during that time the outside fan runs, but
    I guess this has to do with freshening the air inside the room by
    bringing air from the outside, and doesn't have anything to do with
    cooling. Am I right?

    Pascal Damian
  5. By "running", I mean actually cooling - the compressor and fans are

    I expect that the blue LED is just a "power on" indicator, and that
    the air conditioner is only producing cool air when the orange LED is
    on - that is, the orange LED indicates when the thing is actually
    running, and doing useful work.
  6. Spajky

    Spajky Guest

    quite true for a an 2KW thermal power one ...
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