Heating blows hot even if temp is set at LO

[Dcraen]

Hi There

I just bought a Cayenne Turbo. The problem we have is the following.

My wife does not support airco. So in all the cars we had before I just turned of the airco. The car will then get direct air from the outside not cooled and not heated. If I put the Cayenne airco to Economic I get air in the car that is heated up to 38% even if the external temperature is 21% and the inside temp is set to low. If I put the airco on the temperature comes back to the set value in the car. I went to the Porsche dealer. They tested with the diagnostic and said that all is normal. They say the Cayenne take incoming air on the left side. The air passes close to the engine and therefore is heated. I thought that a valve should be able to close the hot air intake.

Did anyone had the same or does anyone has a thought on this.

Thanks

[number9ine]

Hi There

I just bought a Cayenne Turbo. The problem we have is the following.

My wife does not support airco. So in all the cars we had before I just turned of the airco. The car will then get direct air from the outside not cooled and not heated. If I put the Cayenne airco to Economic I get air in the car that is heated up to 38% even if the external temperature is 21% and the inside temp is set to low. If I put the airco on the temperature comes back to the set value in the car. I went to the Porsche dealer. They tested with the diagnostic and said that all is normal. They say the Cayenne take incoming air on the left side. The air passes close to the engine and therefore is heated. I thought that a valve should be able to close the hot air intake.

Did anyone had the same or does anyone has a thought on this.

Thanks

Other than examining fault codes, did the dealer actually inspect the ducting in your dashboard? Anything from a missing piece of foam to a malfunctioning flap motor could cause a minor "heat leak" that may not adversely affect the air-conditioned air temp.

I'd try placing a thermometer on or near the pollen filter and then aft of the vents to see the temperature differential. If the temp is the same, the dealer's right and you should resign yourself to using AC. If it differs, something might be wrong with the system. They're right anyway that heat from the engine will make your cold air less cool, esp. in summer.

Perhaps there's an upgrade to your wife that would support AC? :-D

Mark

[Dcraen]

Hi There

I just bought a Cayenne Turbo. The problem we have is the following.

My wife does not support airco. So in all the cars we had before I just turned of the airco. The car will then get direct air from the outside not cooled and not heated. If I put the Cayenne airco to Economic I get air in the car that is heated up to 38% even if the external temperature is 21% and the inside temp is set to low. If I put the airco on the temperature comes back to the set value in the car. I went to the Porsche dealer. They tested with the diagnostic and said that all is normal. They say the Cayenne take incoming air on the left side. The air passes close to the engine and therefore is heated. I thought that a valve should be able to close the hot air intake.

Did anyone had the same or does anyone has a thought on this.

Thanks

Other than examining fault codes, did the dealer actually inspect the ducting in your dashboard? Anything from a missing piece of foam to a malfunctioning flap motor could cause a minor "heat leak" that may not adversely affect the air-conditioned air temp.

I'd try placing a thermometer on or near the pollen filter and then aft of the vents to see the temperature differential. If the temp is the same, the dealer's right and you should resign yourself to using AC. If it differs, something might be wrong with the system. They're right anyway that heat from the engine will make your cold air less cool, esp. in summer.

Perhaps there's an upgrade to your wife that would support AC? :-D

Thanks for the quick reply. The dealer told me that during diagnostics the temp is messured before and after each valve. This is their way of checking if the valves do close. I am driving around with a thermometer for the moment. So I am checking . I also checked on the upgrade for my wife. These upgrades happen to be very expensive.

Mark

[number9ine]

I also checked on the upgrade for my wife. These upgrades happen to be very expensive.

Amen! :lol:

Either way, let us know what happens.