AC not working

[Loperamide]

The AUX fan was not working but after over a year I have now finally replaced it. However the AC is still not coming out cold and the fan does not spin unless I unplug the high pressure sensor.

I have noticed the compressor clutch does not engage, so does this mean the compressor needs replacing or is it possible the system needs to be regased? Can it lose gas without using the AC for this long of a period?

[jpilk99]

I'm no expert here, but, in my experience - if your refrigerant level gets too low, it won't kick in your compressor/clutch when you hit the snowflake (AC) button. I've been able to infuse a can of refrigerant and, during the process, the compressor clutch kicks in and things start working.

But, as I'm sure you know - there could be a host of other issues; leak in the system/bad compressor/etc.

[upallnight]

Originally Posted by Loperamide

The AUX fan was not working but after over a year I have now finally replaced it. However the AC is still not coming out cold and the fan does not spin unless I unplug the high pressure sensor.

I have noticed the compressor clutch does not engage, so does this mean the compressor needs replacing or is it possible the system needs to be regased? Can it lose gas without using the AC for this long of a period?

Since the refrigerant pressure in the system is a lot higher than the atmospheric pressure, if there's a leak in the system the refrigerant will leak out. A good place for a leak is one of the hose, hose fitting, or the condenser. A bad place for a leak is the evaporator in the dash. In order for the ac system to work, the compressor clutch needs to be engaged. If the compressor clutch is not engaging the ac will not work.

[OptimusPriM5]

My experience was compressor kicked in no fan though blowing warm air. Shop diagnosed leaks in Schroeder valves and replaced the sensor voila 44degrees now and fan comes on

Good luck

[mario4705]

My experience was i had to replace the whole unit, including the freon, costed me $2k to get it all fixed