It could be several reasons. First, the freon level may be low. I would have the freon pressure checked first, or you can do yourself. Second, you could have a bad compressor sensor. Third, the compressor itself could be bad or you could have bad expansion valve. All could cause short cycling.
Some a/c compressors cycle on and off to maintain a set temperature.
Bad compressor
To help dehumidify the air
A simple answer would be; it turns on the ac compressor.
If I change the AC compressor in a car, do I have to change the orifice?
form_title= AC Compressor Replacement form_header= Replace your AC compressor with help from the pros. What is the model number of the air conditioner?*= _ [50] Is this for your home or car?*= () Home () Car How old is the air conditioner?*= _ [50]
comp may cycle when you have the defroster on
AC compressors will cycle like that when there is insufficient refrigerant.
The car seats because of the extra energy it needs for the AC compressor work
Your cars engine accessory belt drives the AC compressor.
The ac compressorThe ac compressor
An AC compressor is part of an air conditioner which may be used in a car's AC system. The compressor is used to change the pressure between the AC's compartments in order to help condense the refrigerant gas back into a liquid.