Blower motor not working

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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briang76215
Posts: 2
Joined: Tue Nov 21, 2017 7:02 am
Year and Model: 1996 850
Location: Philadelphia

Blower motor not working

Post by briang76215 »

I have a ‘96 850 with MCC heat. I am having a problem with the blower motor. When I turn the blower on in any position, 1-4, nothing happens.

From what I understand, the blower motor resistor works the motor in positions 1-3. So if the resistor was bad, the blower should still work on position 4.

The blower relay works the motor in position 4. So if the relay was bad, the motor should work in positions 1-3, but not 4. Is that correct?? I do hear the rely click when I put the heat in position 4.

I checked both fuses and they are both good.

I pulled the blower motor to check if it was seized. It was not seized and did spin freely. I replaced the blower motor about a year ago and it did work until about a week ago. I did buy a cheap aftermarket motor off eBay, so maybe I got what I paid for?? Also, there was an electrical burning type of smell in the car around the time the blower stopped working.

Any advice on what to do next would be appreciated. Is there anything else I should be checking besides the motor, the resistor, the relay and the fuses?

Also, would it be safe to test the blower motor by running jumpers from the battery directly to the motor?

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erikv11
Posts: 10208
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, V70, S60R, XC70
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Post by erikv11 »

Yes, testing the blower motor with 12V is the thing to try next!
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 293k
'06 S60 R, 167k
'07 XC70, 170k
'99 Camry V6 :shock: 130k
gone: '96 NA 850 210k, '98 NA V70 182k

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