2007 s60 Rad fan on high

kvengel · Post by **kvengel** » 23 May 2016, 14:07

Hi Folks,
I have an 2007 s60 turbo where the rad fan stayed on high this winter. I installed a new thermostat & sensor in housing, nope.
So for the cold It's been unplugged. This the plug has the magenta wire (where I read changes pwm per required fan speed).
I took it in to have it diagnosed came back with needs new fan (as they only sell whole units, used here are not found).
So I shelled out 600 for the fan and the day i fired it up with new fan unit worked briefly.
What triggers a fan on high, no signal or as i read 10 ms or 20 ms at 100 hz.
Thanks,
Keith

kvengel · Post by **kvengel** » 26 May 2016, 12:44

Hi Folks,
I have an 2007 S60 turbo where the rad fan stayed on high this winter. I installed a new thermostat & sensor in housing, nope.
So for the cold It's been unplugged. This the plug has the magenta wire (where I read changes pwm per required fan speed).
I took it in to have it diagnosed came back with needs new fan ecu (as they only sell whole units, used here are not found).
So I shelled out 600 for the fan and the ecu, relay i fired it up with new fan unit worked briefly.
What sensors trigger a fan on high?
Thanks,

edited May 26 12016
hoping for a response...

MarcM · Post by **MarcM** » 26 May 2016, 18:33

Check your A/C is charged. My 2005 has been doing the same thing for months (waiting on a relative to remember their HVAC vacuum pump to recharge system) since I replaced condenser.

jenkinskg · Post by **jenkinskg** » 08 May 2017, 05:15

Saw video they said fanc ecu bad causes fan to run with no signal, usually kills battery