Skip the auto shop - Our mechanics make house calls

Q: Blend door

asked by on

My blend door actuator is bad. If I were to place valves on coolant lines going to heater coil, would this allow the AC to cool the car when they are closed?

A: No. The blend door actuator changes air to ...

No. The blend door actuator changes air to flow over the heater core or the evaporator and in between. If the actuator is stuck in one position toward heat, then you may not get heat but only fresh air moving around.

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: I can't seem to figure what these parts are called please help :(

Hello, thanks for writing in about your Mercury Grand Marquis. You would need to at least describe the part or supply some pictures so we could help identify the parts for you. Feel free to resubmit another detailed question to...

Q: Cooling fan not kicking on

The first thing I would do is check to make sure that you have a good ground for the fans, then I would check for voltage output from the relay and then at the fan connector. I would also use...

Q: Engine is misfiring on my car

A faulty mass air sensor can cause rough running due to the injection mapping being improperly set. Unplugging the sensor can, in some cases, cause the rough running to clear up as a fault is set and the engine computer...

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...
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...
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...