Q: Dual zone control not working right

asked by on

The dual zone control is not working properly. There is a 10-degree temperature difference between the driver's side and passenger's side air conditioning. Also, there is a lower airflow out of the passenger's side vents.

Each side has it’s own temperature blend door, and sun sensor. There is an in-car temp sensor on the drivers side. I wouldn’t be too worried about 10 degrees. The air flow might indicate a problem. The whole system is computer controlled. It has the ability to set trouble codes. If a mode door, or blend door is malfunctioning, is should set a code. Only a very expensive aftermarket scan tool will have the ability to check for this, or a Ford scan tool. Check your cabin air filter. They can become very dirty, very quickly. I found a Ford bulletin about a software update for the HVAC unit, so it might be best to have Ford check it out. If you’re out of warranty, they will probably charge you for the update.

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. Dual zone control not working right

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: Front impact

Hello. Your truck is equipped with an inertia fuel shit off switch. When your truck impacts something, this switch opens and keeps the fuel pump from functioning. It is located under the dash and can be reset by pressing the...

Q: AC clutch making squealing noise

Of course, make sure the oil and refrigerant charge are correct. Too much of either will create an excessive load on the compressor. Also, check the operating pressures to see if they are within an acceptable range. Check belt alignment...

Q: hard starting after engine has run. 1996 Ford F-150

Hey there, thanks for writing in. From what you describe, it sounds like the engine TFI module on the side of the distributor is most likely bad and causing the no start hot. If you would like to have this...

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...
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...
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.