Main fan will not turn off

Tiny
JONATHAN JENSEN
  • MEMBER
  • 2004 VOLVO XC70
  • 185,000 MILES
The main fan will not shut off when the car is running.
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Wednesday, April 22nd, 2020 AT 3:13 PM

1 Reply

Tiny
KASEKENNY1
  • EXPERT
I suspect you have a cooling temperature sensor issue. However, we need to start with checking for codes. I also attached a testing for the fan. First set is get codes so let's start there. Here is a guide that walks through that. If you don't have a scan tool then stop by a parts store and they can check for codes.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

If there are no codes then I suspect we have a wiring issue causing the fan to stay on high. However, this sounds more like a command issue because the ECM thinks the temp is higher then it is actually is.
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Wednesday, April 22nd, 2020 AT 6:40 PM

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