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 1,000 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!
  1. Home
  2. Questions
  3. A/C stuck on floor and defrost will not change on any settings

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: Fan wont blow out top vents for defrost.

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...

Q: Turbo oil leak - air filter intake

Hi there: Although we don't see may of these vehicles here in the United States, on your 20102 Chevrolet Captiva Sport and most four-cylinder turbocharged vehicles; there are multiple oil seals that can wear out on the turbo, the fuel...

Q: Car makes high-pitched squealing noise from air conditioner

If your car is making a high pitched noise and having air conditioning problems, that may be a sign that there may be a problem with the blower motor, or perhaps blend door actuator. I would recommend having a professional...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...