924Board.org

rockhound72 · Posted: Sat Mar 21, 2015 8:42 am Post subject: Cooling fan fun

1979 924 I replaced the coolant temp switch and checked all relays and fuses. I also hooked up the fans to see if they work, and they do. But, they will not turn on. My squirrel cage will stay on though. If I have to it in traffic when the engine is warm, I have to turn the car off. I know it isn't the thermostat. I took it out. I've replaced ALL the hoses also. Has anyone wired the fans so they stay on?

D Hook · Joined: 02 Nov 2002 Posts: 3158 Location: Omaha, NE

You say you don't have a thermostat in it at all?
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'80 924 n/a SOLD

rockhound72 · Posted: Sat Mar 21, 2015 8:50 am Post subject:

Took it out because i thought it was the reason my engine was getting too hot, so I don't have one in there right now.

D Hook · Joined: 02 Nov 2002 Posts: 3158 Location: Omaha, NE

I don't understand the squirrel cage fan. Where is it located?
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'80 924 n/a SOLD

rockhound72 · Posted: Sat Mar 21, 2015 9:02 am Post subject:

the squirrel cage fan is the little noise maker up by the front windshield center. Small fan enclosed by a little cage.

D Hook · Joined: 02 Nov 2002 Posts: 3158 Location: Omaha, NE

Ah got it. The later 924's actually had a squirrel cage fan. The one you're referring to is the ventilation fan for the cabin.

Does the car get hot, like into the red zone?
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'80 924 n/a SOLD

rockhound72 · Posted: Sat Mar 21, 2015 10:02 am Post subject:

jason c · Joined: 13 Jan 2014 Posts: 1018 Location: Nwi

The "squirrel cage" fan has nothing to do with the cooling fans or overheating. Neither does the coolant temp switch.
You need to check the fan switch in the radiator.

rockhound72 · Posted: Sat Mar 21, 2015 10:12 am Post subject:

i just replaced it. still nothing. If I jump the connection, the squirrel cage comes on. Really weird huh?

jason c · Joined: 13 Jan 2014 Posts: 1018 Location: Nwi

What connection? You said you replaced the temp switch. You do know the switch for the cooling fans is a different part right?

You shouldn't run a 924 without a thermostat.

rockhound72 · Posted: Sat Mar 21, 2015 11:08 am Post subject:

I replaced the temp switch at the top of the radiator. When I jumped those two connections the squirrel fan comes on. Something isn't quite right.

rockhound72 · Posted: Sat Mar 21, 2015 11:10 am Post subject:

the two pin radiator switch is the one i'm talking about. When that trips, my fans should come on.

rockhound72 · Posted: Sat Mar 21, 2015 11:14 am Post subject:

I have replaced the water pump and all its hoses as well.

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

If the cockpit fan comes on when you jump the rad temp switch, but the rad fans don't come on, there is something seriously FUBAR'd with the wiring in your car.
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erstwhile owner of just about every 924 variant ever made

jason c · Joined: 13 Jan 2014 Posts: 1018 Location: Nwi