[kaerts]

Got an '89 GT I've had for 19 years now and do a lot of the work myself; unfortunately this latest problem has got me pretty stumped.

I replaced the blower motor, resister, and switch- and found out that it was the motor that was the actual culprit. Anyway, bought a NEW blower motor instead of buying a used OEM one, installed it and put the housing back exactly the way it was. The motor runs fine, but produces a very, I mean a very weak stream of air from the vents.

Are the new motors not as powerful or something, should I have bought a used OEM one- or am I missing something?

BTW- I reached around the back of the housing to make certain that the black rubber hose that goes directly from the motor back to the housing was still in place properly and it was- I'm stumped, and if anyone can shed some light on the situation, it would be greatly appreciated. Thanks a million!

 

[duckbubbles]

Did you have to swap the squirrel cage fan to the new motor? If you did and you got it reversed, the efficiency of the fan goes to crap- DAMHIK. The blades on the squirrel cage point in the direction of rotation- I hope that makes sense. Also, if the direction of rotation on the motor is reversed, pretty much the same thing will happen.

Frank

 

[kaerts]

Thanks Frank for the advice! Yep, had the squirrel cage fan rotating the right way- I think I just found the solution though!

I yanked the blower housing out and took the motor out and was looking at the original motor and the new together- and realized that the new motor doesn't have the foam insulation to make a good seal like OEM. Plus the company I purchased the motor from (LRS) shipped me one with the metal flange bent up real bad. It took me a while to straighten the flange out with a pair of pliers and and a heck of a lot of effort. So from the get-go I had issues with the motor seating on the housing properly. Now, I just put a clear silicone caulk on the housing where the motor will seat, and am letting it setup to form a new gasket. Think this will do the trick!

 

[duckbubbles]

Air leaks and clearances around the squirrel cage can affect the efficiency of the fan a lot. Get the clearances as tight as possible without rubbing and it will work great.

Frank