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constantly running cooling fan.
i'm sure this one has been beat to death, by most on here, but i guess its my turn now !
i noticed the cooling fan did not come on at the usual temp, and after a quick prod, it did so, but stayed on. also, after a longish run, i would hear the fan run at low speed for a couple mins, b4 shutting off. this has gone too. i'm suspecting the cooling fan relay, accompanied by the thermofan sensor. anyone have any other idea's/ suggestions ?? tnx in advance. i guess now its in the 70's, and time for cruising, the old girl is having her time of the month again!
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1984 944 na. FR. WILK power prom/dual chip. 2005 buick. daily beater 2002 grand am--better halfs ride. olds 98 royal brougham--gone, but not forgotten. |
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04-20-2006, 05:09 PM
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Join Date: Feb 2001
Location: Viera FL
Posts: 5,642
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Bad thermo-fan switch.
AFJ
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Es geht nicht darum wie schnell man faehrt, sondern wie gut man schnell fahren kann. Ihr Brunnen der nutzlosen Porsche Information |
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04-20-2006, 05:48 PM
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winter-hater club member
Join Date: Oct 2003
Location: salt lake city, utah
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^^^yep, bad switch at the radiator.
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2000 Corvette - ????, 2007 Buell XB9R - Astrid, 1996 Discovery - Piglet, 2000 Forester "COOL PRIUS!" - Nobody Ever |
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04-20-2006, 06:03 PM
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which one is it then ? the 75, or the 95 degree one.
tnx, guys.
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1984 944 na. FR. WILK power prom/dual chip. 2005 buick. daily beater 2002 grand am--better halfs ride. olds 98 royal brougham--gone, but not forgotten. |
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04-20-2006, 07:55 PM
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winter-hater club member
Join Date: Oct 2003
Location: salt lake city, utah
Posts: 24,705
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um... let me consult my crystal ball...
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2000 Corvette - ????, 2007 Buell XB9R - Astrid, 1996 Discovery - Piglet, 2000 Forester "COOL PRIUS!" - Nobody Ever |
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04-21-2006, 05:20 AM
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if you do, then the lottery #s please!!
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1984 944 na. FR. WILK power prom/dual chip. 2005 buick. daily beater 2002 grand am--better halfs ride. olds 98 royal brougham--gone, but not forgotten. |
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04-21-2006, 02:08 PM
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winter-hater club member
Join Date: Oct 2003
Location: salt lake city, utah
Posts: 24,705
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Quote:
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2000 Corvette - ????, 2007 Buell XB9R - Astrid, 1996 Discovery - Piglet, 2000 Forester "COOL PRIUS!" - Nobody Ever |
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04-21-2006, 04:20 PM
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The temperature switch for the fans has to match your thermostat. If you are running a high degree thermostat and a low temperature fan switch the thermostat will close to raise the engine temperature and the fan switch will turn the fans on constantly to cool it back down making the two devices work against each other. If you have a high temperature thermostat, use the higher temperature fan switch and vice versa.
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Tom 1990 944S2 Cabriolet 2002 Chevy Silverado 2500HD 2003 Maroon Ford F350 dually |
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04-21-2006, 06:33 PM
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ok, now i'm confused. i took both relays out, the cooling fan relay, and the air condx relay. after checking clarks garage, it would appear that both relays should be the same electrically, as they have the same pin connections, but they dont. the air condx relay, seems to be a "multi-use" relay, for several applications, and the connector #'s dont match whats in clarks! looks like one side of the relay contacts is well burned up, so thats one problem, and also #3 fuse, additional board had gone south too.
so, i'm ordering a whole bunch of relays, and thermo switch, and the friendy sparks at work, is going to check/repair my coling fan resistor, as needed. as far as i can see {bearing in mind i'm electrically-challenged), it looks like 2 cooling fan relays are required, as the diagram shows two sets of contacts, needed at each relay!
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1984 944 na. FR. WILK power prom/dual chip. 2005 buick. daily beater 2002 grand am--better halfs ride. olds 98 royal brougham--gone, but not forgotten. |
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04-22-2006, 09:37 AM
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additional info, the relay in air condx spot is marked "#24". its a larger one in the cooling fan spot, and the terminals are marked A/B/30/85/86/87.
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1984 944 na. FR. WILK power prom/dual chip. 2005 buick. daily beater 2002 grand am--better halfs ride. olds 98 royal brougham--gone, but not forgotten. |
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04-22-2006, 09:49 AM
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1984 Porsche 944 2.5l 8 valve 
