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Registered User
Join Date: Sep 2013
Posts: 18
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944 S2 - heater: constantly on high
I have a 1990 S2...
The heater will not shut down. It remains on high all the time. I suspect that its a control valve but I don't know where its located. Are there instructions on how to install a heater control valve, IF, that is the problem. Just for some history: before, as I suspected something was going wrong, the heater control on the dash was very sensitive like it was either all the way on, or all the way off. Thanks, any help will be appreciated. 
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04-01-2014, 08:53 AM
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I had that problem on my 88 951. The control valve was buried on the firewall behind the cylinder head. It was a pain to reach, even with the intake off.
The vacuum diaphragm failed internally, but the valve itself looked fine from the outside. I suspect you can find a diagram that shows its location if you look at PET and of course the FSM's and/or Hayne's manual will help you with whatever work you need to do on the car. Hope this helps....
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Stefan Portland, OR 1979 Porsche 924 Carrera GTS (clone-ish) 1988 Porsche 944 Turbo S (Silver Rose) |
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04-01-2014, 08:59 AM
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Current: 87 944S Black/Black, 89 944 Turbo S ANDIAL White/Burgundy, 78 924 Black/Black, 17 Cayenne S, 03 Turbo X50 Aero instagram @mhariush http://stores.ebay.com/Techniker-Parts/ |
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04-01-2014, 12:11 PM
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Registered User
Join Date: Sep 2013
Posts: 18
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I have been reading about the clip... I understand its in line about where the gas pedal is. thx
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04-02-2014, 06:47 PM
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No, the clip is in the passenger side foot well.
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Current: 87 944S Black/Black, 89 944 Turbo S ANDIAL White/Burgundy, 78 924 Black/Black, 17 Cayenne S, 03 Turbo X50 Aero instagram @mhariush http://stores.ebay.com/Techniker-Parts/ |
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04-02-2014, 08:55 PM
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Registered
Join Date: Oct 2000
Location: Tampa,fl
Posts: 657
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On late cars, it is in the driver footwell. Clark's Garage Home Page, Heater malfunctions
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'90 944S2 cab - sold after 20 years, will not be forgotten. '04 Mercedes SL500 - Nice but my S2 was more fun to drive. |
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04-03-2014, 12:49 AM
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Registered
Join Date: May 2003
Location: Stumptown
Posts: 502
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On the S2 the heater valve is on the passenger side, right next to the oil filter. Zip tie it closed to see if the heat turns off. That being said, when I had this issue with my S2, it was the clip.
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04-03-2014, 09:19 AM
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darnellsgarage
Join Date: Nov 2007
Posts: 932
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Consistent heat. Clip nearly every time.
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don |
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04-05-2014, 08:59 AM
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Fiba-Toofah
