2011 Honda Civic 1.8 AC problems?
After putting 2 used ac compressors the ac still blows hot air. The ac clutch turns on and off. What other problems could it have.
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Is the freon level correct? One sign that its low is when the compressor constantly kicks on and off within a few seconds instead of running for a decent amount of time. Make sure the radiator and condenser fans are coming on.Start the vehicle and turn the ac on max, are both cooling fans on? If not, that's your problem.Both fans are supposed to come on so that heat can be removed from the freon while its in the condenser. The condenser is mounted directly in front of the radiator usually. If fans aren't working, check the relays, fan motor, cooling fan switch(if vehicle has one)and the computer. If fans are working, make sure the condenser fins are free of debris.A dirty or clogged condenser will cause ac to blow warm air. Make sure the fan speed on the ac control panel is set on its highest or next to highest setting when ac is on max. If it isn't, the evap core will freeze up. With fan on high, if little to no airflow is coming from the vents and the fan is working right, the evap core is froze up
Seeing all of the details you have provided, this is my best analysis and conclusion.
Maybe the original compressor suffered internal damage due to lack of lubrication due to low refrigerant charge (the oil is carried by the refrigerant). Thus scattering debris and other metal dust/flakes throughout the system, which the two subsequent compressors have successfully been able to force the blockage even tighter into the condenser, drier filter and expansion valve, thus creating a never ending restriction that causes the low side to pull down way to quickly-causing a low pressure cut-off of the compressor. Then after the compressor is off, the system might naturally equalize enough to allow a pressure rise at the low pressure switch and the compressor turns on again, then the cycle repeats itself…
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