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.

A: Hi there. Check the blend doors to the ven...

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・Save up to 30%

Get a quote

What others are asking

Q: Car popped and is now rattling.

The noise you hear may be the flywheel and torque convertor making a rattling knocking noise. The noise may come and go when you put it in and out of gear. If this is the case the manufacturer recommends the...

Q: Brake wear warning light

Hey there, thanks for writing in about your 2011 Lexus LS460. If the light does not clear after several drive cycles then there may be an open in either of the brake pad wear sensor circuits. Continuity of these circuits...

Q: Honda Civic with screaming timing belt when cold and wet

You probably need a fan belt. Timing belt is inside the timing cover and it has cogs on it and it can't squeal because it's got cogs and it can't slip. If it groans, it means that the timing...

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...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...