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| 944 thermostat http://forums.tipec.net/viewtopic.php?f=25&t=23236 |
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| Author: | Jessi [ Sun Feb 25, 2018 2:29 pm ] |
| Post subject: | 944 thermostat |
I assume the thermostat has gone, even when turned on to cold my heating is pumping out very hot air, so much so that I had to travel with the sunroof / window both slightly open yesterday just to stop sweating !! How much should I be looking at for a new thermostat fitted ? Cheers. Ian |
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| Author: | hotblack944 [ Sun Feb 25, 2018 4:20 pm ] |
| Post subject: | Re: 944 thermostat |
Have a read of this http://www.clarks-garage.com/shop-manual/hvac-01.htm |
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| Author: | stratfordshark [ Sun Feb 25, 2018 6:13 pm ] |
| Post subject: | Re: 944 thermostat |
Is your engine overheating, or failing to reach normal operating temp? Engine cooling and cabin heating are very different systems, so I doubt t-stat is involved. I admit to knowing nothing about 944 HVAC, but solution will lie in reading up on that system and testing relevant components. My knowledge limited to 928s where always hot cabin temp would be caused by: Failed cabin or external temp sensor Failed blending flap motor Failed slider pot/connection to hvac head |
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| Author: | Waylander [ Sun Feb 25, 2018 6:34 pm ] |
| Post subject: | Re: 944 thermostat |
Broken clip on the control rod 944 572 313 00 944 572 314 00 944 572 217 00 Part numbers for the clips, all about £2 each |
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| Author: | Jessi [ Sun Feb 25, 2018 10:31 pm ] |
| Post subject: | Re: 944 thermostat |
Thanks guys. The engine temperature seems fine and the cars running sweet, someone suggested a broken clip / rod on the controller, this sounds possible, I was going to take it in to GT-one porsche in chertsey pretty soon anyway as the short-cut button for the window heating has stuck. Also whilst I’m here, it had frost on the inside of the window yesterday, I assume it’s common with a 29 year old car kept out over night ? |
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| Author: | Prophead [ Mon Feb 26, 2018 1:03 am ] |
| Post subject: | Re: 944 thermostat |
Waylander wrote: Broken clip on the control rod 944 572 313 00 944 572 314 00 944 572 217 00 Part numbers for the clips, all about £2 each I second that. worst case the valve the rod goes to is stuck open. |
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| Author: | AlpineTurbo [ Tue Feb 27, 2018 10:09 am ] |
| Post subject: | Re: 944 thermostat |
The control rod clip does break. An often overlooked part is the vacuum operated actuator on the heater rail (coolant line) in the engine bay. If that actuator is broken, inoperative or is not having vacuum applied to it you'll always have hot air entering the cabin. IME a vacuum line can knock off it. To test put the car to to position no.2 Put the car to red hot on the climate panel and the rod should be fully extended. Then put it to fully cold. The actuator rod should go into the diaphragm and stop the flow of water into the cabin. |
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