Skip the auto shop - Our mechanics make house calls

Q: Air control knob staying in one position

asked by on

My defrost/air knob only stays in one position. When trying to turn it, the knob bounces back to to the defrost position.

There is a possibility that the mode door for the vent, floor, defrost blend door is broken in the evaporator case, or that something fell into the case through the defroster duct and is binding the door. The dash panel and center controls need to be removed to access the lever. I recommend you seek a certified mechanic, such as one from YourMechanic, to come and test your vehicle for you to see if they can see if something is binding the lever or cable and that the problem is not inside the evaporator case.

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: Wont let me add coolant/water to radiator after it is drained

You have to open the small bleed screw below the fill cap on the engine. Use a hose connected to the nipple to catch any fluid so it will not get on the belts. Pinch off the overflow hose and...

Q: I just bought a used 2014 Mitsubishi Outlander yeaterday with 60107 miles on it. THe gear shifter seems awful stiff... is this a c

If the car feels differently than it did at the dealership yesterday, you should probably take it back and ask them about it. There may be an adjustment that can be made, or it could be that there is a...

Q: The parking brake is locked up and the car will not move.

Hi there. The light that come on the dash when the parking brake pedal is applied and then shuts off when the parking brake pedal is released is a normal condition. The parking brake cable could be broken for the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...