A/C fan question

[Jump6pack]

While I am driving with the A/C on, after a while the fan acts like it stops. I can still hear the fan noise, but there is no air coming out of the vents. Later it will start blowing. Anyone have experience with this? I tried to search, but even searching the word "fan" I get no hits. Any help is greatly appreciated.

Thanks

Jim

[Matt42]

My first guess would be that the high speed brushes on the radiator cooling fan have gone bad. I had this problem with mine. The AC worked great at highway speeds and on really hot days, but not in city driving or on moderately hot days. Highway speeds caused enough air to blow thru the condenser to make the AC work, and a really hot day caused the low speed circuit part of the radiator fan to turn on.

With help from this forum, I was able to make the diagnosis. Try this: On a cold engine, open the hood. Turn on the engine. Go outside and listen to the sound under the hood. Go back in and turn on the AC all the way on, full cool. Go back out and listen again. You should listen to a fan roar. If you do not hear the fan roar, you need a new fan assembly. If you do hear the fan roar, something else is wrong, possibly a refrigerant leak needing a recharge.

[Jump6pack]

Thanks for the reply Matt, it is the interior fan (sorry for not being specific) that quits blowing. It makes noise and the little air that continues to come out of it is still cold. I am just wondering if it is a possible minor fix before I replace the fan motor.

Thanks

Jim

[slartyblarfast]

Your evaporator is freezing up. Condensation freezes on it and blocks airflow. Your A/C system is most likely low on freon or the low pressure switch is bad.

[Matt42]

Originally Posted by Jump6pack

Thanks for the reply Matt, it is the interior fan (sorry for not being specific) that quits blowing. It makes noise and the little air that continues to come out of it is still cold. I am just wondering if it is a possible minor fix before I replace the fan motor.

Thanks

Jim

No worries. Just disregard everything I typed after "My first guess . . "