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Cooling fan not coming on

Help, Advice, Owners' Discussion and DIY Tutorials on the Volvo S80 model. Sometimes called an "executive car", the S80 was and continues to be Volvo's top-of-the-line passenger car.
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Posts: 6
Joined: Tue Oct 13, 2015 3:36 pm
Year and Model: 2000 S80 T6
Location: Baltimore, MD
United States of America

Cooling fan not coming on

Post by Pilot9302 » Tue Oct 03, 2017 3:12 pm

I have had a huge problem with my 2000 S80 radiator boiling over. I changed thermostat, checked water pump and realized the cooling fan is not coming on. I've been driving with the heat cranked up and the heater fan on. I replaced the fan twice. The first time, it would not go off. Now the replacement won't come on. I checked the resistance of what I believe is from the temperature sensor going to the fan for I assume is the signal to turn on the fan. The resistance when hot is 167k ohms. Sounds high to me. It has a purple wire.
Is this the cause?

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