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If you have access to VDCS or a similar diagnosticky thing that does a proper deep scan of all the car's modules (not just a basic one for simple codes) you can check to see that there are no faults on the AC flap control motors and gubbins - just in case you're not all the air diverted to the right places?

Summat a bit like this:-

Address 08: Auto HVAC (J255) Labels:| 5K0-907-044.clb
Part No SW: 3T0 907 044 AL HW: 3T0 907 044 AL
Component: Climatronic H14 0302
Revision: 00004001
Coding: 0000000000
Shop #: WSC 73430 790 09999
ASAM Dataset: EV_Climatronic A01001
ROD: EV_ClimaAutoBasis_SK35.rod
VCID: 7CA1F3FC06640B1B0EB-8028

1 Fault Found:
9473041 - Motor for Left Temperature Flap
B108C 11 [008] - Short to Ground
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 7
Reset counter: 48
Mileage: 104309 km
Date: 2020.05.23
Time: 05:51:12

Premium Member
5,878 Posts
A good AC system needs to modulate rather than be on/of
That's what the newer Yeti ones do, the swash plate drives pistons when it's at an angle but when not needed it goes to 90 degrees so the compressor is not pumping at all but the compressor is still rotating.
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