Mechanics

HVAC

1987 Porsche 928 • V8 2WD Automatic • 141,000 miles

No signal from HVAC control box. Replaced relay. If relay is jumped HVAC works. Supply 12v to trigger relay, system works. Internal sensor on fan?
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Acars
March 28, 2011.



No testing info is availbe from the manufacturer, I do have the wiring diagram if you need it, post your email and I will send it.

Merlin2021
Mar 28, 2011.