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・Fair and transparent pricing

Get a quote

What others are asking

Q: Climate control off by 8 degrees

Hello Dennis, thank you for writing in. The automatic climate control uses a cabin temperature sensor, blend doors, and engine temperature sensors to regulate the air coming into the cabin. There may be an issue with any of these components,...

Q: Car will not start

This may be related to many different possibilities, some of which may be related to a lack of spark and some of which may be related to a fuel delivery problem or a combination of both. For example, if the...

Q: slightly harder to turn right. Easier to turn left. Steering wheel doesn't always return to the center when turned left.

Hi there. Assuming there is no accident damage, the power steering rack and pinion is most likely at fault. Directional power steering issues are not usually created by a power steering pump issue. The newer model year and low mileage...

Related articles

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...
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...
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.