Brewtoo,

Your system automatically puts it in recirculate mode most of the time whether you hit the recirc button or not. I've been all through this in the last few weeks in the course of diagnosing my system. Two weeks ago I would have agreed with your hypothesis, but I have since learned differently.

By the temps you listed, if it were not recirculating that means you were dropping the temperature about 54 degrees F. That is all but impossible. A typical drop from a properly operating a/c system is about 40 degrees if its really working good.

89300ce,

With outside temp at 82 and vent temp at 49 you are dropping the temp 33 degrees. That's not too bad. This assumes, of course, that the system is bringing in fresh air since we have yet to confirm that your system is recirculating.

Have a great day,