just the other day when it gets cold outside the heater fan will not turn on but during day it comes on
Nov 14, 2010 at 9:18 AM
heater fan
2004 VOLVO S80
JCARR755
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Temperature extremes can cause weird things, especially if a part is ready to fail anyway.
What you'll need to do is narrow things down by first checking the fuse to make sure it's good and seated tightly.
Also, are you using a manual or automatic setting??? If you are using automatic, then there's probably a "Cabin Temp" sensor that is failing.
Next,remove the fuse and use a test light or voltage meter and insert the leads into the contacts where the fuse goes. Turn on the blower motor in manual mode.
If the light comes on or you read voltage, then the wiring is good and the blower motor is bad. If no light or voltage, then the problem is in the control unit, probably a sensor.
What you'll need to do is narrow things down by first checking the fuse to make sure it's good and seated tightly.
Also, are you using a manual or automatic setting??? If you are using automatic, then there's probably a "Cabin Temp" sensor that is failing.
Next,remove the fuse and use a test light or voltage meter and insert the leads into the contacts where the fuse goes. Turn on the blower motor in manual mode.
If the light comes on or you read voltage, then the wiring is good and the blower motor is bad. If no light or voltage, then the problem is in the control unit, probably a sensor.
Nov 14, 2010 at 10:43 AM