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Car Forum / Porsche / Porshe 944 / October 2006heater fan speed
Hey Everybody. (as Dr. Nick would say) Got a question. I have a bit of an issue with my heater fan. The story so far...... The fan stopped working. Even with the quick defrost button. I took out the relay for the fan and the "on - hot" lead was melted. A little shocking to say the least. The relay is fine but when I took out the fuse panel, a wire had been bared and was shorting out to the frame. It looks like the wire was to the a/c. I wrapped up the wire again and made sure that this would not happen again. I cleaned the contact on the fan relay and put it all back together. I now have the fan working but only on the high speed setting. The quick defrost works now too. At least I have some heat and a defrost. Does anybody know how I can get the slower speeds working. Thanks in advance Tod it's quite likely oxides in the "central eletronics", although it may also be worth checking that the short didn't destroy the dropping resistors that are put in series with the motor when you select lower speeds - can't remember where they are physically, but that's a second possibility > Hey Everybody. (as Dr. Nick would say) > [quoted text clipped - 19 lines] > > Tod  SignaturePosted via a free Usenet account from http://www.teranews.com oxides in the "central eletronics" ? I am not familiar with this. Where / what is it? Tod >it's quite likely oxides in the "central eletronics", although it may also >be worth checking that the short didn't destroy the dropping resistors that [quoted text clipped - 23 lines] >> >> Tod the "central electronics" box (that's what Porsche calls it) uses copper bus bars, and on my car they oxidized and caused some odd problems, one of them related to the fan. "central eletronics" refers to the box above the pedals that has all the fuses and relays in it. > oxides in the "central eletronics" ? > I am not familiar with this. [quoted text clipped - 30 lines] >>> >>> Tod SignaturePosted via a free Usenet account from http://www.teranews.com Ahhh. Looks like I will be taking out all the fuses and relays again. Good thing I kept my diagram. Thanks T >the "central electronics" box (that's what Porsche calls it) uses copper bus >bars, and on my car they oxidized and caused some odd problems, one of them [quoted text clipped - 34 lines] >>>> >>>> Tod Most likely you need that fan speed resistor that lives under the black plastic cover at the back of the engine compartment. Pull up the rubber hood seal that's right at the firewall, then you'll be able to pull up the front edge of the plastic that covers the fresh air blower box. I don't recall if the resistor is under a secondary cover, but I don't think it is. Last time I had to change one, it was about $100. Good luck. > Ahhh. Looks like I will be taking out all the fuses and relays again. > Good thing I kept my diagram. [quoted text clipped - 41 lines] > >>>> > >>>> Tod |
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