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The mkiv Supra Owners Club

Small fan constantly running


Hamilton

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Hi,

 

I'm hoping someone can help me with a recent problem. I replaced the radiator a week ago and since then the small fan next to the main viscous fan is constantly running. It never did this before but now comes on with the ignition. I replaced that fan's control switch at the bottom of the rad but it hasn't made a difference. It's my understanding that the small fan should only come on at 100 degrees.

 

If relevant I also disconnected and removed the air con fan at the very front of the car while I was working around there- it was very rusty and I won't be replacing it (not all Supras have this fan). Just thought I'd mention it.

 

Does anyone have any idea why the little fan is now constantly running? I'd be very grateful for suggestions! Thanks.

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I'll go with the easy one first, have you tried reconnecting the disconnected air con fan?

 

I wish I could, but I stupidly got rid of it pretty much as soon as it came out. The connector for the fan is still there- is there anything I can do to the pins to make it seem as though the air con fan is still part of the circuit?

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when the sensor plug at the bottom of the radiator is disconnected it makes this fan run constantly . I do this to help with cooling on the track for the auto box fyi

 

I thought as much. My problem is that the fan is running constantly even with the sensor connected.

 

Glad to know it doesn't do too much harm to run it constantly though!

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