Skip the auto shop - Our mechanics make house calls

Q: Heating blows cold - 2006 Porsche Cayenne

asked by on

I have a problem with the heating in my car. It is blowing cold air only. This happens even though I set the thermostat on high. I had it checked and it works correctly. About a year ago, I had the coolant pipe system replaced. I also checked the coolant and it's at a good level. I was suggested to have a new thermostat installed. I did that but the issue persists. What should I do?

A: Hello. Based on what you have described, I ...

Hello. Based on what you have described, I am almost 100% certain you need to replace your blower motor control module / resistor. Not getting AC is much more common than not getting heat because heat comes from the hot coolant running through the engine. Finding heat is easy. Making the AC blow cold is much more complicated. No heat and no other coolant related issues make it almost certain that it is the resistor that has blown for the blower.

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: Evaporative Emissions Control

If your problem is only related to not being able to put fuel in your tank, this may actually be related to your evaporative emissions system rather than the fuel tank itself. The EVAP system prevents fuel vapors from the...

Q: Too much hot air coming in the cabin through the vents

The first thing to do when you feel access heat from the vehicle is to check the cooling system. Chances are likely something has failed. Always start by checking the level of the coolant. If it is full, then you...

Q: My heater blows a lot of air it just doesn't get very hot

Hello there, a few common faults will cause your vehicle to have air that is not very hot. Without knowing the year, make and model of the vehicle I can only provide a broad answer. The most likely faults are...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...
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.