There could be a wide variety of reasons. You might have blockage in the system, you might have too little or too much refrigerant in the system, you might have too much or too little compressor oil in the system, the dessicant in your accumulator or receiver-drier could be saturated... what you need to do is have a system performance test done on your AC system.
so its not blowing at all anymore, as in no air at all? if tahts the case then how do you know its still cold. if it isn't blowing as well you may just need to change out your filter, just like in a house all cars(most)have a air conditioner filter. if its not blowing anymore at all it sounds like your compressor or your whole dam motor went out, take it to shop.
If it's blowing and you can tell the compressor is still kicking on when you turn the A/C on, the Coolant probably just needs to be recharged. Especially in a 9 year old car.
Was the voltage to the compressor clutch checked? Not knowing how thorough the under-hood check was, it sounds as if the compressor is not engaging. The causes for that are varied, but it is an electronically controlled event.
I repelaced the air conditioner compressor and the climate control unit. on the counsel, the compressor still reads, OFF and the air won't come on. is their a way to reset?
Possibly a stuck relay
Still Kicking - album - was created in 2005.
If compressor is running 80-100% of time without recycling, it may still be low on freon. If freon pressure is good, may be expansion valve.
If system was opened to the atmosphere it will have to be evacuated prior to charging
The duration of Still Kicking - film - is 2100.0 seconds.
Still Kicking - film - was created on 2006-07-19.
It is probely the Hi pressure switch.
Well, how is the air conditioner "unattached", exactly? If it's on a serpentine belt and you want to bypass the compressor, you have to make sure you have the right length of belt and that it's properly routed. If you simply pulled out the AC relays, the truck should still operate normally.