Skip the auto shop - Our mechanics make house calls

Q: My blend door isnt working.

asked by on

My blend door isn't working. I have replaced the actuator and the temp control switch. It does not have climate control. I can open and close it manually.

My car has 138000 miles.
My car has an automatic transmission.

A: The next thing to do is to check all the po...

The next thing to do is to check all the power and ground circuits. Looking at a manual temperature controlled Taurus, the switch is a part of an integrated temperature control module. Inside this module is a temperature control potentiometer. It is this potentiometer that signals the actuator's position. Testing the signals between the temperature module and actuator requires code retrieval from the body control module, a flow chart and a mulitmeter. Even with a manually set temperature, there is a module that the switch is attached to for determining the correct blend door position. This module could be at fault or there could be a bad connection somewhere in the circuits for this system. This can be a complicated testing process, so if you need assistance, a certified YourMechanic technician can be dispatched to your location to perform a Heating and A/C inspection on your vehicle and suggest any necessary repairs.

Good luck!

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: The car is burning oil significantly

Hello. Thanks for writing in about your 2004 BMW 330xi. Unfortunately, this is very common for a vehicle to burn more oil as the engine ages. One thing you can do to combat the oil consumption is to use high...

Q: When I drive My steering is turning left and right without turning I don't know what is the problem

Hello, thanks for writing in about your 1997 Nissan Maxima. From what you've described you should have the front tires checked. One of them may have a broken/shifted belt. The tire basically becomes egg-shaped rather than round and can potentially...

Q: Does a new ECM for this year make model need to be flashed in order to drive the vehicle? 2004 Ford Focus

Yes, a new ECM will have to flashed before you can even start your vehicle. The "flashing" or programming of the ECM will require your VIN number to the supplier, who should be updating the most current software for your...

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...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.