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Automatic heater system

Heating and Ventilation

Vehicle Information: Model: carrera ; Year: 1984; Body Type: Targa; Engine (type, size, modifications): 3.2; Total Mileage: 120000;

My car has the automatic heating control. In the past when I have gone to turn on the heat at the dial numbers 6 thru 8 and defrost(#9) I would hear the fans come on. Now when I go to turn the unit on at numbers 6 thru 8 the fans do not come on but if I go to the defrost dial (# 9) all the fans turn on as they normally would. I have checked all the fuses and relays and all seems fine. Any ideas as to why the Automatic Heating control seemingly is not working at #'s 6 thru 8?

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