Q: Dual zone control not working right

asked by on February 09, 2016

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

Power window problem

Hello! I believe that the issue you are having is caused by a faulty window regulator. It is a fairly common part failure on your particular vehicle. I suggest that a knowledgable technician, such as one from YourMechanic, test the...

truck cranks but wont start

Verify that the fuel pump is getting power when you crank the engine. You should have 12 volts at the connector. If not, then the fuel pump circuit has to be diagnosed. Start with the basics. Make sure fuses are...

I started having trouble getting the clutch to go into gear.

It appears that you may be experiencing signs of a worn out clutch given the year and mileage, that may likely be the case if this is the original clutch. Other components such as the clutch master and clutch slave...

Related articles

A Buyer’s Guide to the 2012 Ford Fiesta
This This subcompact vehicle is available as a 4-door sedan as well as a 5-door hatchback. The prices for the vehicle are very low, even for the models that are decked out with all of the optional features. Those who...
How to Replace an AC Pressure Switch
The AC pressure switch protects the AC system from pressure that's too high or low. Common signs of failure include a bad compressor or lack of AC.
How Long Does an AC High Pressure Hose Last?
Your Your car’s AC system works very much like your home’s air conditioning in that it uses a refrigerant to hold heat and then to deliver cool air. Depending on the amount of pressure the refrigerant is under, it will...