Radiator Fan is not strong enough to reduce engine temperature

2004 VOLVO XC90
48,000 MILES
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CGOMEZR
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  • 1 POST
Hello... my XC90'04 T6 radiator's fan seems to be starting and keeping at a slow speed, let's say about 35%, even when the engine temperature is about 220oF or 230oF (yes... that high). When connected to a scanner, it is able to manually set higher speeds and putting it to 85% it is able to reduce engine temperature in about 1 or 2 minutes to normal. What could it be wrong?
I would say it is the fan, the relay or the line, but as I mentioned above, using the scanner I am able to manually set the fan speed to a good speed. The car by itself is not able to do it. Any idea?

Thanks in advance!
Nov 19, 2011 at 12:10 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Could be the engine coolant temperature sensor and the high and low relay and computer itself
Nov 19, 2011 at 12:18 AM
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