Why Does The AC Compressor Keep Running After I Turn OFF The Defroster

Posted in Air Conditioning | Asked on Jan 18, 2012

Probably my lack of precision but I should have asked “why does the compressor keep running after I turn OFF the defrost-setting” … I can accept that defrost engages compressor, removes humidity, lubricates pressure-seal, etc but compressor continues even after switching the vent / AC settings to “normal”. I asked this question earlier but didn’t seem to convey my meaning very clearly. Thank you earlier answerers :) … but I’m wondering if maybe something is wrong with 2006 Nissan Sentra … excellent car otherwise

There are 3 Answers for "Why Does The AC Compressor Keep Running After I Turn OFF The Defroster"

  1. Mdk68gto, Ase Certified M Tech says:

    If you are still moving air through the cab by using the heater/ac system, then the compressor will remain on unless you turn it off. that device dries out th air in the cab. a dry heat is a more comfortable heat and it will defrost and dry the wind shield faster.

  2. Anand says:

    Its some electrical problem or switch problem not an compressor problem

  3. Gary® says:

    On your aircon unit control, do you see A/C switch button?
    press to turn it off when using heater.
    move selector knob to red zone.
    adjust fan speed to desire speed

    for cooling, aircon function.
    turn on AC switch to engage compressor unit.
    move selector knob to blue zone.
    adjust fan speed to desire speed

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