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1995 993 heater blower

Heating and Ventilation

Vehicle Information: Model: 993; Year: 1995; Body Type: Cabriolet; Total Mileage: 77k;

Joel, thanks for the response to my question (below). I changed the relay for the heater blower, but that did not solve the problem. I had previously replaced a resistor and a temperature sensor, both of which plug into the heater blower unit. Is there another temperature sensor that controls the operation of the heater blower, or is there any other cause you can think of?Area: 964 / 993 / 996 incl. Cup cars Classification: Heat and Ventilation Subject: 1995 993 cab rear heater blower Question: The rear heater blower of my 1995 993 cab continues to run about 15-20 minutes after I turn off the ignition. I understand this should occur when the engine is very hot. However, the blower runs even when the engine has only been operating for several minutes in cold whether. I have replaced the heater resistor and the temperature sensor, but these replacements did not fix the problem. Any ideas as to the cause and the solution? Answer: When you say the temperature sensor, there are a number of them. If you mean the one right by the blower itself, yes I agree that is the first one I would think of. Past that I would plug in the Bosch Hammer or PST2 and see what is going on in there, and see if the control unit has any faults stored. If you don't have one of these tools, you will need a Bosch or Porsche shop to do this. If you want to try something else first, you could change out the rear blower relay in the engine compartment, maybe it is stuck and is unable to release. If anyone has any other ideas I will pass those along, and if you wouldn't mind letting me know how you make out with this, I would appreciate it. Joel Reiser - PCA WebSite - 3/5/2005

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