XC60 blower motor failure

QUARKS40 · Post by **QUARKS40** » 07 Jan 2018, 11:20

Blower motor isn't working on my XC60 today. No Codes, no air flow. T'shooting today. Any tips would be helpful. I know if I need to replace the motor the uber special Volvo tool is necessary.

QUARKS40 · Post by **QUARKS40** » 07 Jan 2018, 21:58

Currently tracing out the wire path to try to bypass the Resistor/power relay/rheostat to determine if the fan motor itself is dead or just resistor. I didn't get very far before I had to quit. Not that it makes a whole lot of difference if it's one or the other. You still have to remove the dash to do it correctly.

Post by **RickHaleParker** » 07 Jan 2018, 22:08

Warm up engine, turn the heat on. Place a voltmeter across the plug to the blower motor. If there is voltage across the blower motor and the motor does not run, tap motor with a rubber mallet, if motor starts running it is the blower motor ... no buts ifs or ands.

QUARKS40 · Post by **QUARKS40** » 07 Jan 2018, 23:14

I'll give it a whack. I post the following for those who may also be struggling with this issue and for future reference. I apologize for the order the attachments are in.

QUARKS40 · Post by **QUARKS40** » 07 Jan 2018, 23:27

The Principle is simple. Control the resistance of the ground path for the blower motor with a small signal from the CCM to the Power Relay (P/N 30767040) to vary the speed of the motor.
MY fondest hope is a bad connection CCM to Power relay or a nasty ground. To that end, I sacrificed a Plasma Arc to the spirit of Electrons and said prayers to Various deities including Joe Boo.
I will however give the fan a decent whack - if I can get at it - and record the results.

QUARKS40 · Post by **QUARKS40** » 09 Jan 2018, 15:53

Unable to give the fan motor a whack without removing the Instrument cluster. If I'm going that far, I might just as well replace the D*** thing.

Fan, tool and Power Relay (Resistor) ordered. Disassembled the glove box in anticipation of parts arrival. Watched the you tube video here:
https://www.youtube.com/watch?v=z-9SKu49LBE Entertaining and informative viewing for anyone considering this task.

Post by **RickHaleParker** » 09 Jan 2018, 17:00

If I'm going that far, I might just as well replace the D*** thing.

That is true. In my book blower fans are preventive maintenance items.
Running around without a defroster in good condition is a safety issue.

Post by **oragex** » 14 Jan 2018, 09:01

These commonly fail within 60K miles or so, and 'luckily' they are buried and require the special $100 tool. Almost like replacing the timing belt job, only sooner.

QUARKS40 · Post by **QUARKS40** » 15 Jan 2018, 08:31

I feel so lucky

QUARKS40 · Post by **QUARKS40** » 19 Jan 2018, 18:31

QUARKS40 wrote: ↑09 Jan 2018, 15:53 Watched the you tube video here:
https://www.youtube.com/watch?v=z-9SKu49LBE Entertaining and informative viewing for anyone considering this task.

While that video is certainly informative, Only the information regarding the passenger side disassembly is applicable to an XC60.
The Drivers side is different in that there is a brace built into the dash of the 60 that prevents you from accessing the rear of the motor to disconnect the power connection and disengage the locking tab, not to mention the screw that may or may not be installed to retain the motor. (You can't see if it's there - the view is obstructed.)
Hence the entire dash assy must come out.