Skip the auto shop - Our mechanics make house calls

Q: Fan wont blow out top vents for defrost.

asked by on

after pushing defrost , fan vents on top of dash dont blow air

My car has 84000 miles.
My car has an automatic transmission.

Hi there. Check the blend doors to the vents and see if they move when the switch is turned. If they do not move, then check for a vacuum hose to the blend door actuator. If there is no vacuum on the actuator, then see if the vacuum hose has a leak in it. If the actuator is electronic, then check for power to the actuator. If there is power and a ground circuit, then the actuator needs replaced. If you need further assistance with defroster not working on top vents, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Too little flow on the EGR.

Have a certified mechanic check the operation of the EGR(exhaust gas recirculation) system. In many cases, the fault can come from an EGR valve that is not working properly or carbon build-up blocking the recirculation passages.

Q: 2011 528i ticking noise when turning steering wheel L or R , is that normal?

Hi there. On some of the heavier BMW's, a slight ticking noise when turning extreme to either side (meaning all the way) is common. It really depends on what and where the ticking noise is appearing which would determine if...

Q: 08 jaguar blows cold air but while at a stop starts blowing semi cool air had service no leaks told it was fans not working / but

If the condenser fans are not working properly, the effect that you are describing (delivered air not as cold at idle) will occur. The condenser fans provide the air flow that is necessary to remove a lot of the heat...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...