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The fan that blows the heat/defrost has stopped working when on the lower speeds. If I turn it all the way up to the highest speed it will blow but really hard. How can this happen? Is it a tough fix? Thanks, Carol

Answers from the Automotive Experts

Amanda J. Pierce, MBA Carol, By your description it sounds as if your blow motor controls may be faulty! I would have them checked to verify. This can be a simple relay.

Audra Fordin, Owner at Great Bear Auto Shop Hi Carol, The heater control itself usually causes this trouble. It is also possible the door that allows the heat to come in is broken. If there is not a lot of force (air) pushing on it, it does not open. WIth a lot of force, it does push through. Start by having the control unit checked. I believe this will be an easy repair. Mechanically yours, Audra www.womenAUTOknow.com

Barb Petrey, President - DBK Enterprises Inc at Jiffy Lube It is probably a control module that has gone bad. You need to take it to a mechanc.

Laurie Sarno, Co-Owner at Super Girls Auto Hello Carol, This problem may have two causes--the first--and most likely--is a failed resistor in the heater fan circuit. The other possible cause is a bad heater fan switch or wiring. Hope this helps--Super Girls Auto

Lori Johnson, Owner and Instructor at Ladies Start Your Engines Dear Carol, You need to replace your fan relay. This can be a fairly easy job if you know where it's located. Many times it's inside the vehicle on the front passenger side, but it varies from vehicle to vehicle. If you can get your hands on a repair manual for your vehicle this may be something you can do. Good luck. Lori Johnson www.ladiesstartyourengines.com

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