Sounds like the ac compressor is cycling.

 

ayup, moparman's called it... If you have a stethoscope or long metal or wooden probe, put it on the a/c, start her up, put your ear to the probe n give a listen.

 

Or just watch the ac clutch.

 

WAIT?!? You mean it doesn't have to be time consuming, troublesome or needlessly complex?
Where's the fun in that???

 

 

The only way the a/c comes on is by command. Your fan switch is either turned to the a/c position, a separate a/c switch is in the on position or you're in defrost mode. If your freon is low, the hi or low pressure switches won't close n the a/c clutch won't engage. To be fair, you could be low on freon, the system still has enough to turn on the a/c but not enough to properly "cool". If that's not it, I'm guessin' that the problem maybe within the mixer doors n that's why it never feels cold, but if the a/c is indeed working/cooling, a quick way to verify it is to look under the pickup n see if water is drippin' from the drain line.

 

Try putting the hvac **** in the off position. The compressor should not run at all unless there is a problem with hvac switch. Compressor should only run on ac and defrost. It sounds like it's not staying on long enough to get water from the drain just feel the line coming out of the compressor and see if it's cold.

 

The cheap way to fix it is to leave it unplugged. If you want A/C you'll have to figure out what's wrong. It could be low on freon, or a sensor might have failed, the orifice also could be plugged. The clutches do wear out. I don't know if you can buy the clutch separately, or have to buy a complete compressor. You can buy the bearing for the clutch.