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?

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
  1. Home
  2. Questions
  3. Heating blows cold - 2006 Porsche Cayenne

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: Service engine light is on

Hi There, Generally when the check engine light is on, it will register a code in the computer indicating which oxygen sensor is bad. i would suggest starting with replacing oxygen sensors first as this is much more common to...

Q: Heater works when moving. Stops working when sitting at light. Makes a gurgling sound. What could be the problem?

Hello. Thank you for writing in. The most important part of the heating system is the coolant. The first step to take is to make sure your coolant level is topped off in the radiator and the overflow tank. If...

Q: Where is the thermostat located on a 2009 Saturn Vue?

The thermostat on your vehicle is located below the throttle body, on the top side of the engine. The hose from the radiator will be connected to its housing, and will likely need to be removed in order to gain...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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.