Climate unit blower replacement

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
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Rich_Lovina_99
Posts: 9
Joined: Sun Sep 06, 2009 11:23 am
Year and Model: 850T 1995
Location: Perth

Re: Climate unit blower replacement

Postby Rich_Lovina_99 » Wed Sep 09, 2009 2:58 pm

My blower only seems to be working on low speed; the high manual air blasts have all but disappeared. What might be the cause? Tks in advance.

Ozark Lee
MVS Moderator
Posts: 14126
Joined: Thu Sep 07, 2006 2:24 pm
Year and Model: Many Volvos
Location: USA Midwest
Flag: United States of America

Re: Climate unit blower replacement

Postby Ozark Lee » Wed Sep 09, 2009 9:01 pm

My blower only seems to be working on low speed; the high manual air blasts have all but disappeared. What might be the cause? Tks in advance.


Welcome to MVS,

Before we can start to figure it out we need to know what style of climate unit you have. The manual climate control (MCC) has fan speeds that range from 0 to 4 and the temperature settings are marked by graduated width red bars. The electronic climate control (ECC) has an Auto setting on the blower speed and the temperature settings are in degrees.

Let us know what type of unit you have and we can work from there.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
'98 S70 T5
'99 V70XC - RIP - Wrecked Parts Car.
'99 V70XC - Nautic Blue
Previous:
'96 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

Rich_Lovina_99
Posts: 9
Joined: Sun Sep 06, 2009 11:23 am
Year and Model: 850T 1995
Location: Perth

Re: Climate unit blower replacement

Postby Rich_Lovina_99 » Thu Sep 10, 2009 2:10 am

Hi, thanks, I worded that badly. Its a '95 850 Turbo with automatic climate control. What I meant was, until recently, if I turned it manually to max air (e.g. demisting), it would blow with full power. That function of the blower is not now working. e.g. with cold weather at present, if I set at 25 c. fan only blows gently to warm the car.

User avatar
marginal
Posts: 312
Joined: Thu Sep 24, 2009 3:24 am
Year and Model: 850 GLT 1997
Location: Montreal, Canada

Re: Climate unit blower replacement

Postby marginal » Wed Oct 28, 2009 3:13 am

Hello everyone and thank you for the helpful topic :) ...
I have the electronic control unit on my car and with the cold weather I noticed it almost does not blow hot air through the lower vents:
Image
I turned the power to maximum and it started making noise, but not enough air flow.
I thought the electronic control in the middle does not work, but when I turn it, it changes something as the noise changes.
Also, when I turn it completely down ( @ six o'clock for the floor air flow) it blows from the top too :shock: ...
So, probably my air ducts are dirty or my blower motor is exhausted?
Please help.

Rich_Lovina_99
Posts: 9
Joined: Sun Sep 06, 2009 11:23 am
Year and Model: 850T 1995
Location: Perth

Re: Climate unit blower replacement

Postby Rich_Lovina_99 » Wed Oct 28, 2009 7:27 am

Now that hot weather is here suddenly, like 38c, my fan seems stuck on lowest speed only...still working and cooling car, but very gradually. Or does a fan effect come just with air-con on? Makes no difference 'auto' or 'full manual power'.
I guess if there's no boost its the fan has given up??

Ozark Lee
MVS Moderator
Posts: 14126
Joined: Thu Sep 07, 2006 2:24 pm
Year and Model: Many Volvos
Location: USA Midwest
Flag: United States of America

Re: Climate unit blower replacement

Postby Ozark Lee » Thu Oct 29, 2009 1:35 am

Marginal,

You problem is likely with the mode damper - on an ECC that is easy to get to through the glove box. Remove the damper motor and inspect the shaft, it is common for the end of the shaft to split.

Replacing the damper flap is a huge job, the entire dash needs to come out to do it but it can usually be repaired in place by either sliding a bushing over the end of the shaft or wrapping the shaft with a fine - 22 gauge to 24 gauge - solid copper wire. In the end it is much like the joints on a fishing rod are reinforced.

EDIT: I just found your repair post - well done.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
'98 S70 T5
'99 V70XC - RIP - Wrecked Parts Car.
'99 V70XC - Nautic Blue
Previous:
'96 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

User avatar
marginal
Posts: 312
Joined: Thu Sep 24, 2009 3:24 am
Year and Model: 850 GLT 1997
Location: Montreal, Canada

Re: Climate unit blower replacement

Postby marginal » Thu Oct 29, 2009 3:11 am

Thank you Ozark Lee ...
I repaired it today.
Great forum and great people here :) ...

User avatar
Pauloil
Posts: 1036
Joined: Wed Mar 22, 2006 3:20 am
Year and Model:
Location: davenport, IA

Re: Climate unit blower replacement

Postby Pauloil » Thu Nov 12, 2009 3:50 am

I replaced with new blower motor that has been in my garage for a few yrs.
incredible difference on my 95 850! It is not that hard to drive the cage off of shaft, but next time I will just but the whole assembly.

Thanks to Ozark Lee for useful writeup and pics!
99 V70XC 158K

95 850glt 188K

User avatar
marginal
Posts: 312
Joined: Thu Sep 24, 2009 3:24 am
Year and Model: 850 GLT 1997
Location: Montreal, Canada

Re: Climate unit blower replacement

Postby marginal » Thu Nov 12, 2009 3:54 am

Hello everyone.

Does anyone have an idea how to disassemble and lubricate the fan's shaft so it starts turning freely?

Thanks.

BEJinFbk
Posts: 3117
Joined: Sun Jan 06, 2008 5:32 am
Year and Model: '98 V70 R
Location: Fairbanks, Alaska
Flag: United States of America

Re: Climate unit blower replacement

Postby BEJinFbk » Thu Nov 12, 2009 4:55 am

marginal wrote:Hello everyone.

Does anyone have an idea how to disassemble and lubricate the fan's shaft so it starts turning freely?

Thanks.

You can take it apart more than once and try to fix something
that sounds like it's well beyond it's "sell by" date,
or just buy a new one and only do the job once.
I mean, C'mon...You live in Montreal and winter's comin'...
You do NOT wanna mess with this when it's cold out. Never fun.

Call these guys and at least get a price:

DW Volvo / Parts Dept
(800) 689-0021
Ask for Don or Jamie

Stay Warm! :mrgreen:
'98 V70 R - Well Equipped for Life Up North... ;)


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