Cayenne blowing hot air...

[Oktay]

My Cayenne is blowing hot air when I switch of the AC and use the Econ mode.

For example even though the outside temp is 17 degrees C (63 F) and the interior temp settigs is set to same or even Lo it blows around 26 degrees (79F) hot air. If I switch on AC everything works fine. It looks like the engine is heating the air all the time.

I took my car to the official service 3 months ago and they've replaced cabin filter and checked for error codes but at the end they've told me that eveything is in order. But unfortunatelly it's not as I have to switch on the AC or use the Auto mode all the time. I wonder is there anything I could check about this annoying issue.

Thanks,

Oktay

[wvicary]

If you have access to a scan tool, verify that the ambient and cabin temp sensors are within limits. You can also check the limit positions of the heat blend door servo motors but it would be very odd for both to fail in the same manner so check common items such as the temp sensors.

[Oktay]

Thanks but I don't have a scan tool.

It looks like my only option is to take the car again to the service and have them check the temp sensors.

[boxerm]

When in the econ mode, the a/c is turned off. That why it is economical.

[mudman2]

And that is the only way to turn AC off, its normally on for all other conditions

[Oktay]

That's true it is the only way to switch the AC off.

My friend has the same car and he does not have this problem. He gets the same air temp. as the outside.

By the way here 1 gallon of gasoline is 10 USD. I pay 260 USD to fill my tank and can do only 500km inside the city.

That's actually why I preffer the econ mode when the weather is cold :) I mean why use AC and spend more gasoline...

[ohboy]

not to slip off the topic but I had seen that it was proved to be false. I may be wrong though :0)

[yugo]

I'm experiencing the same thing on my 2006 Cayenne S. In ECON mode, the air coming out of the vents is warm/hot after the engine has run for about 15 min even at the lowest setting. In AUTO mode with the A/C on the temperatures are fine. Has anyone found the reason for this?

[Tecchie]

The hot air likely is coming from al the metal being heat soaked.  The issue I'm having is my AC is charged, newer compressor, but the air never get ice cold... it'll get "cool" but humid.  Drains are not blocked at all..