Wvphysics (and Docfixit) -- this thread is the closest that I've found to the problem I'm having with the used '00 Sunfire that I just purchased two weeks ago.
The A/C is ice cold, but after running continuously in the mid-Florida heat/humidity for a period of time (perhaps 20-30 minutes) the strong flow of air from the vents dwindles down to next to nothing (albeit still cold). Turning the fan to the highest speed at this point results in an abnormally loud grumbling from the blower motor (or whatnot) on the passenger side of the vehicle, without much of any impact on the outflow.
I popped open the engine during such an occurrence and noted thick amounts of ice had developed on the lines, but little else (as the bulk seems quite concealed).
If the A/C is shut off (even with fan still running) within a handful of minutes the airflow is again restored, and the A/C can be restarted until it dwindles again. It's almost as if the blower is getting locked up with ice, then melts, then gets locked up again.
I suspect we're having the same problem. Perhaps we can troubleshoot this together? I'm afraid I certainly don't have the diagnostic equipment or knowledge that you seem to be able to tap into, but I'd like to ride on your solution if you don't mind.
Friday, August 12th, 2011 AT 11:28 PM