Skip the auto shop - Our mechanics make house calls

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.

A: Each side has it’s own temperature blend do...

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 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: Loud rattling coming from underneath the vehicle

This could be caused by a loose lower cover plate. Trucks have a metal plate that protects the underside of the engine from debris. This plate is often removed for repairs and sometimes not all the bolts will be present...

Q: Engine overheating chime will not turn off even when the engine has been off overnight. whats the fix?

Hi there. Check the coolant temperature sensor and see if the sensor has a harness plugged in on it. Look at the harness and make sure that the harness is not melted. Check for a voltage reference on the harness...

Q: How do I wash the wheels on my truck?

Over time, the tires on your truck will become dirty. Cleaning the wheels regularly will ensure that they maintain their shine. To clean the wheels. Use Motorcraft Wheel and Tire Cleaner to clean the wheel. Remove tar and grease....

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...