Skip the auto shop - Our mechanics make house calls

Q: A/C stuck on floor and defrost will not change on any settings

asked by on

I won't change off defrost/floor setting I replaced the blend door actuator and did not seem to help it

My car has 56000 miles.
My car has an automatic transmission.

Hello. You need to see if the mode door actuator is working. This actuator is on the evaporator case on the driver’s side above the gas pedal. You have to remove the knee bolster for access. If this is the actuator you replaced, then you need to unplug the actuator and just plug in the old one while moving the mode selector with the vehicle running to see if the actuator will move to different positions. If it does, then the evaporator case mode door is stuck. If the actuator still will not move, then you have a control panel issue and will need further testing using a scanner. If you need help having this diagnosed, consider YourMechanic, as a certified technician will be able to come to your home or office to pinpoint the cause of your AC problem.

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: I am having issues with the defroster blowing cold air on the driver side

Hi there. There is a blend door issue on your ducting to your heating and air conditioning system. Check all of the blend doors and make sure that they are working. The blend door that is not working properly can...

Q: I hear a whooshing sound when I turn the steering wheel. If I make a sharp turn, I hear a grinding sound coming from the back. ???

Hi there. In most cases, the rear knocking sound is caused by the driveshaft, drive axles, differential gears, transmission mount, or the rear struts. The sound you're experiencing is very difficult to diagnose, but could be caused by the power...

Q: Fan not blowing cold air

When using a refrigerant/recovery machine to service the air conditioning system, a vacuum function is available. This function makes sure that there aren't any leaks in the system allowing the refrigerant to escape. If the compressors aren't actuating, the system...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...