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My daughter's 2012 Panamera 4 has got a issue with the blower fan. Yesterday she reported a weird sound inside the vehicle, she thought it may be the radio (the AC still worked fine). Today the sound came back, but the fan blower no longer worked. I was able to run diagnostics on it and the AC system came back with 16 faults. The PSM reports a C12019 - no communication with the Air Conditioner regulator. After I reset the codes, to see if anything returns, the AC fan blower does come back on and makes a wheezing noise - the speed stays on low...Is this a case of the Blower Motor dying or dead? I have enclosed pics of the codes. Any input would be greatly appreciated!
Definitely sounds like a hard fault with the blower motor since you have mechanical fault codes. The wheezing noise is also a tell-tale sign that it's giving up the ghost.
These are 2 part numbers for fan housings: 970 573 912 00 fan housing 1 970 573 922 00
This could be the electric stepping motor for the mixing flap: 970 573 841 00
Regulator part number: 970 624 423 01
These are the distributor housing part numbers: 970 573 914 00 distributor housing /LL 970 573 915 00 distributor housing /RL
(not sure of /LL /RL meaning)