Porsche 928 HVAC Controller Repair
Автор: Mark Franke
Загружено: 2021-06-02
Просмотров: 5764
How to repair a common Porsche 928 HVAC controller unit failure, which leads to loss of AC function. Shows typical controller internal relay failure symptoms and as-found condition. Shows replacement with a more robust relay to restore full controller function. The factory installed unit is made by Behr. Its internal relay for the AC compressor clutch is small, rated for 2.5A. The AC compressor clutch that it supplies can draw more. It is common to see these burn out leading to puzzling intermittent failure, or full failure of air conditioning function.
While not shown in the video, consider adding a protective fuse inline with the controller power.
More detail on unit removal and installation, without damaging anything, can be found here: • Porsche 928 HVAC Controller Removal and In...
Credits to Dwayne and others in the 928 community for repair methods.
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