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Forum Newbie: No Heat/No Defrost Blower Works Fine

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1996 - 2004 S40
1996 - 2004 V40
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mikep1250
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Year and Model: 2000 V40
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Forum Newbie: No Heat/No Defrost Blower Works Fine

Post by mikep1250 » Fri Nov 23, 2018 8:02 pm

Hello, all,
I bought my 16 yo son a 2000 Volvo V40 that my buddy had bought new. He took meticulous care of it and it’s a great first car for my son. We are approaching winter and the heater is not working as it should. I was a Porsche technician in my previous life and have good knowledge of the basic mechanical workings here. I don’t have a stuck therm or stopped up core. It seems as though all of my problems are with the blend air and distribution/position doors. He has no defrost and never strong as it should on any other setting (ie: floor, face, etc). Is it possible that I have up to 3 different issues here? Damper, blend air. and temperature doors or motors bad? Just looking for some insight from others that must have had a similar issue. Thanks in advance.

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alschnertz
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Re: Forum Newbie: No Heat/No Defrost Blower Works Fine

Post by alschnertz » Sat Nov 24, 2018 3:57 am

Would like to give you an easy answer, but can't remember any "typical" remedies for your symptoms.
It seems the most common HVAC issue is inoperable or erratic blower operation.

FWIW, I've never been satisfied with the HVAC in my '01. It never seems to send air to where I want it. Additionally, it has a blower with a mind of its own. I've replaced the resister as others have suggested, but it made no difference.
I suspect my issue is the Electronic Climate Control (ECC) board, but until it becomes completely inoperable (like yours) I'll live with it.

There is a place called XeMODeX that repairs the ECC units. Or at least they used to. Maybe they could give you some insight.

https://xemodex.com/us/product/climate- ... 244-10-20/
'60 PV544, '68 220, '70 145S, '86 745T, '95 854T, '01 S40
'84 Prelude
'06 MPV
'13 Ford Focus SE

mikep1250
Posts: 4
Joined: Fri Nov 23, 2018 7:35 pm
Year and Model: 2000 V40
Location: Virginia
United States of America

Re: Forum Newbie: No Heat/No Defrost Blower Works Fine

Post by mikep1250 » Sat Nov 24, 2018 6:52 am

Thank you for the response and input. Yeah, even though this blower seems to be consistent, doesn’t mean it’s working correctly and that it doesn’t still need a resistor. I forgot to mention that he has the 3 knob control unit and one setting is “Auto”, so I’m assuming it’s the fully electronic one for that model and year. Thatvcould very well be the culprit itself. There is another one at a local pick-n-save nearby. I think we’ll go get the control unit, complete blower assembly and maybe some damper motors and start there (even though the used parts may not be any better). We have fun with these father/son projects, so it’s really not a loss when we can spend time together teaching and learning.

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alschnertz
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Re: Forum Newbie: No Heat/No Defrost Blower Works Fine

Post by alschnertz » Sat Nov 24, 2018 7:08 am

If it has an "Auto" setting, I'd say it's safe to say it has ECC.
Agree that one in the p-n-p may have the same issues. Mine's been this way for years.

But still, if you can get the parts cheap enough, it may be worth a shot.
If you do get the ECC, carefully inspect the solder joints, if possible, with a magnifying glass. You may get lucky and find a broken solder joint that can be easily "re-flowed". I've done that before with other electronic components and have about a 50/50 success rate.
'60 PV544, '68 220, '70 145S, '86 745T, '95 854T, '01 S40
'84 Prelude
'06 MPV
'13 Ford Focus SE

mikep1250
Posts: 4
Joined: Fri Nov 23, 2018 7:35 pm
Year and Model: 2000 V40
Location: Virginia
United States of America

Re: Forum Newbie: No Heat/No Defrost Blower Works Fine

Post by mikep1250 » Sat Nov 24, 2018 7:15 am

Heck, that’s a great idea. I can do that with this one when I take it out. I’ve got all the soldering stuff needed if a find break.

mikep1250
Posts: 4
Joined: Fri Nov 23, 2018 7:35 pm
Year and Model: 2000 V40
Location: Virginia
United States of America

Re: Forum Newbie: No Heat/No Defrost Blower Works Fine

Post by mikep1250 » Sun Nov 25, 2018 12:20 pm

So, just an update on my no heat issue. Just thought I would share that the obvious should never be overlooked. ALWAYS CHANGE YOUR CABIN FILTER!!!! That’s all it was. I’ve never seen a filter that clogged before. While the previous owner was meticulous, I forgot to mention that he was frugal.

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alschnertz
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Joined: Fri Apr 29, 2011 9:25 am
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Re: Forum Newbie: No Heat/No Defrost Blower Works Fine

Post by alschnertz » Sun Nov 25, 2018 1:05 pm

Good news.
Hmmm. Now that you mention it, I don't think I've had mine out in 2+ years.
'60 PV544, '68 220, '70 145S, '86 745T, '95 854T, '01 S40
'84 Prelude
'06 MPV
'13 Ford Focus SE

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