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Volvo S70 blower motor issue

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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Ocelot
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Volvo S70 blower motor issue

Post by Ocelot »

Hey guys,

I have a Volvo S70 from 1998 with an ECC. The main issue is with the blower. Sometimes it works, sometimes it doesn't. Today I removed the glovebox compartment and gave the connector on the blower motor a pull and it came back to life. Nudged a bit more and it stille kept on working. Cleaned the connector and the plug with some pc cleaner.

But, ofcourse, the blower motor didn't work when I drove to get some groceries. Can you guys help me out with some solid advice how to get rid of this problem?

Thanks in advance! :D
'Hij die zonder zonde is, werpe de eerste steen. Ik buk wel'. Simon Carmiggelt

Recent car
'98 Volvo S70 2.5 10V Europa edition (Freya)
Previous owned Volvo's
'96 Volvo 440 Si 1.8
'87 Volvo 340 GL 1.7
'85 Volvo 340 DL 1.4
Azik09
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Re: Volvo S70 blower motor issue

Post by Azik09 »

Brushes are close to end.
If my English is bad, please correct me :oops:
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Re: Volvo S70 blower motor issue

Post by Ocelot »

So I need a new blower motor?
'Hij die zonder zonde is, werpe de eerste steen. Ik buk wel'. Simon Carmiggelt

Recent car
'98 Volvo S70 2.5 10V Europa edition (Freya)
Previous owned Volvo's
'96 Volvo 440 Si 1.8
'87 Volvo 340 GL 1.7
'85 Volvo 340 DL 1.4
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abscate
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Re: Volvo S70 blower motor issue

Post by abscate »

There is a good replacement motor from the company TYC that is about half the price of the Volvo OEM one.
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Re: Volvo S70 blower motor issue

Post by misha »

Are there any codes stored in ecc?
Does ac and rec flash when there are codes stored like in 850?
Brushes are pretty durable on the volvo blowers.
Did you try to lube the shaft with some oil or wd40.
Power stage have high sensitivity and if blower pulls just a bit more voltage than it's suppose to pull,ecc will turn it off to protect circuits.
Lubing the bearings will solve the issue in 99.9%.
Talking from my personal experience.

Other thing you can do is to pull the fuse for ECC for 10min in order to reset ECC.
It should work after that....if not....you need to lube the bearings on the shaft.

You need to remove it in order to lube it.
Check the brushes while it's removed....brushes are replaceable part.
Last edited by misha on Sun Jan 19, 2020 4:11 pm, edited 2 times in total.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
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Re: Volvo S70 blower motor issue

Post by cn90 »

- Take it out and lubricate with a few drops of engine oil.

- I wrote a DIY in forum...
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Re: Volvo S70 blower motor issue

Post by Stu70 »

Devils advocate here - wouldn’t lubing any part of fan cause dust to ‘stick’ to the oil/grease and only solve the issue short term?
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Re: Volvo S70 blower motor issue

Post by misha »

Nope....you put a few drops on dry bearings with a straw and syringe down to the shaft.Dry bearings apsorb the oil,you wipe out the excess from the shaft.
Dust can't access the bearings.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
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