Moaning and Groaning
Riding along during a rain storm. Activate the A/C and life is good, then after about 20 minutes I hear a moaning and groaning sound which appears to be in the middle of the car dash. This goes away if I cut A/C off. If I leave on it will continue for a while and then go away, then comes back again later.
Only happens when its raining. Does not happen if it's dry and A/C is on. Any ideas?