The electric heating elements are probably turned on.
If your ac is making noises or is blowing hot air instead of cold
There should be at least a 12 degree split between the incomming air and the air comming out of the vents.
55 degrees to 60 degrees
It could be that the unit is overcharged and the compressor is shutting down on overload. Check to see if the compressor is running when the hot air starts blowing.
does fan door motorized or on a vaccuum line when you switch from AC to defrost?
Actually, the AC is always blowing cold air. Its just that sometimes your nerves can't feel it because your body is used to it.
your blower may be bad. your ac clutch may be bad
why does ac blow warm air? why does ac blow warm air?
It usually means that your system has developed a leak. Your AC system is charged with freon gas. If a certain amount leaks out, a safety device prevents the AC compressor from starting. Without the compressor, no cold air.
you may be low on freon and jsut need a good charge of R134a
This means your Jimmy is pregnant with a Jenny.