Does the compressor run ? If yes, you would need to know what the high and low pressure readings are to proceed.
It could be a blend door problem under the dash, or something else.
SOURCE: 1998 tahoe ac
there should be some aluminum lines under the truck on the rear of body, feel these lines with the a/c on, if they are cold then there is something wrong with your rear blen door, blend door is the door controling the cold or hot desire position, sometimes it is controled by vacium and sometimes it is electrical, if lines are cold what most likelly they will be then have the rear belnd door actuator inspect.
SOURCE: heater blows cold air ac blows warm air
Your problem is the air temp control blend door actuator is defective and not controlling temp u set. to change/access this part the dash assembly must be removed from the car.
SOURCE: 2003 COROLLA S AIR CONDITIONER BLOWS HOT AIR.5
I just fixed mine. My compressor clutch would not engage. The fuse under the dash checked as ok and the freon was fully charged. My compressor clutch wasn't froze, it just wouldn't come on. If this is the case for you, there is a fuse box under your hood, which contains an A/C relay switch. it is the first rectangular block to the left (looking towards your windshield). Mine was white in color. It's about 1" by 1/2" rectangular shape.
Autozone had this part in stock and it cost $27.99 . It was black in color...
Good luck!
SOURCE: 2005 dodge grand caravan heat not working. one
There is a recall that has something to do with the air/heat system in 2005 Dodge Grand caravans. Recall F01. Here is a link. I had mine done two weeks ago, cost me nothing. My air conditioner was overheating.
SOURCE: ac blowing hot air
the blend door actuator located on the air box (right hand side under dash) is prob. inop. worst case senerio the blend door its self is broken. I have replaced the actuator more than anything.
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