How's the airflow coming out of the vents?
During the Winter, I had to improve airflow on my Mom and Pap's '86 Thunderbird (1st car they ever bought new, over 700,000 miles, last time I checked, He rebuilt engine at 600,000!)
The squirrel cage fan, was caked in the fins, and the heater core looked like a 1/4 inch of felt was laid over it.
I removed the fan and cleaned it with a thin toothbrush, Then I put plastic in the floorboard, peeled the "felt off" sprayed it with purple power, rinsed it with the garden hose sprayer.
Unfortunately, I failed to take all of the "Before Pics", It was late, and I was trying to get done.
You can see in the 1st pic, how bad the vanes in the fan were, before I removed it. It barely moved air!
Just something to think about, may not be your problem.
Images (Click to enlarge)
Saturday, June 18th, 2011 AT 2:15 AM