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Why does a car's air conditioner run fine in max setting but shut the compressor off when in normal?

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Answered 2007-10-28 17:10:04

It could happened if air flow trough heat exchanger is not sufficient and to prevent aicing compressor will shut off. Possible reason - clogged air ducts or heat exchanger, when air speed is slow the cooling coil air temp drop, if temp drop below 4c the senor shut off the compresor , when temp rise above 4c it start again

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