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Registered
Join Date: May 2008
Posts: 1,713
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Cooling Fans/Blower Issues
The cooling fans on my 85.5 won't activate automatically...but work fine when switched on using the AC button.
I've recently replaced the thermostat, the upper radiator fan switch, and the fan relay, as well as the water pump, belts, and rollers. All grounds were cleaned a bit earlier, during a complete engine reseal. My ritual has been to turn the fans on manually when sitting in traffic, and also for a brief cool-down after shutting down (AC switch on with key turned over). But it sure would be nice if the fans could just come on automatically as they are supposed to. Not sure what else I can check. Maybe the two "hockey puck" resistors - located behind the glove box? Also, the blower motor does not work (it did for awhile, although briefly and erratically). Have replaced the blower motor resistor and relay - still no go. Any ideas? Thanx! |
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04-29-2013, 06:21 AM
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yarfk
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------Keith------kfray------yarfk------- 87 944 NA stock 116k 06 Honda Ridgeline 83k 10 Vibe 2.4 AWD (Wife's) Retired My week consist of Saturdays and Sundays 
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04-29-2013, 07:55 AM
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Join Date: May 2008
Posts: 1,713
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The Clarks writeup does not cover the above issue.
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04-29-2013, 08:17 AM
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944 addict
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Question: did the blower motor problem and the cooling fan problem show up at the same time? If not the blower problem is likely a separate issue. I had that happen recently and the relay for the blower had a bad connection in the fuse box where the relay plugged into the board. That being said, I'd see if you can replace that relay to check the blower issue.
When you replaced the fan switches are you sure that you used the proper temp range? the thermostat has a specific temp range and the fan switch should match that. I was concerned that mine weren't working so I watched the temp gauge moving up to the second white mark and kept my fingers crossed (a/c off). Fortunately, the fan came on and the temp dropped. If it was the wrong value it either would have come on at a different temp and possibly much higher temp, or not at all.
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3 944's, 2 Boxsters and one Caman S, and now one 951 turbo. Really miss the Cayman. Some people try to turn back their "odometers." Not me. I want people to know 'why' I look this way. I've traveled a long way and some of the roads weren't paved. |
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04-30-2013, 08:03 AM
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Join Date: May 2008
Posts: 1,713
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Update: the cooling fans now come on after parking and stay on for awhile as they should. So...perhaps with my cooler Vermont location, along with the "standard" 80 degree thermostat/85 degree fan switch - things have simply not warmed up enough to make the system work. I'll still keep an eye on this!
The blower still does not work - and this weekend I'll start by jumping the motor, and take things from there. |
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05-02-2013, 01:19 PM
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Keith's Porsche
Porsche 944 NA
1986 Porsche 951
