Climate unit blower replacement

[Rich_Lovina_99]

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]

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

[Rich_Lovina_99]

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.

[marginal]

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:

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 ...
So, probably my air ducts are dirty or my blower motor is exhausted?
Please help.

[Rich_Lovina_99]

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]

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

[marginal]

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

[Pauloil]

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!

[marginal]

Hello everyone.

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

Thanks.

[BEJinFbk]

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!

[marginal]

Hi BEJinFbk and thanks for you reply ...
I forgot to explain: Everything seems to be working OK with my blower.
I am asking about lubricating because I bought a spare second hand blower and when I turn the fan, it does not turn very easily.

I guess this is more clear now ...

[bobice]

My Volvo problem is that the fan runs at max speed as soon as the car is started. After reading this post and others, it seems that the power stage (ECC) has failed and I need to replace it. Can I just get it from Pepboys or AdvancedAutoParts?

[suzinthecity]

How much would it cost to have a mechanic repair this? I suspect that is why my 850 GLT doesn't give me any defrost, AC or heat anymore. It starts for a split second when I start the car, then dies and I can't use any knobs to control it. I have little to no technical ability, so I am wondering if this is something a repair place would do at a reasonable price?

Thanks

[djohnk]

I have a 1998 V70XC I am trying to get ready for a trip up north for Christmas. I just replaced my blower unit (using the excellent instructions in this post, and this video: http://www.howcast.com/videos/51461-All-How-To-Replace-Blower-Motor-in-Volvo-S70-V70-C70-XC70). I also removed and cleaned the temperature sensor. My AC and Heat worked fine for most of the day, but tonight the old problems came back. When I start the car two yellow lights on the electronic climate control blink for about 20 seconds, and I get no air from the blower. I suspect 9 months of using a bad blower messed up the power resistors, but I don't know how to diagnose. Can anyone give me trouble shooting advice? I don't want to purchase a new one at $100+, and find out that wasn't the problem.

I have one other question, I removed the radio easily using the instructions here: http://www.howcast.com/videos/51463-All-How-To-Remove-Climate-Control-in-Volvo-S70-V70-C70-9800 but can't seem to remove the electronic climate control module. The video makes it look easy, and I can't budge it, trust me I'm a big guy and should be able to remove it. I don't want to break it, but am not sure if something changed in the design. Anyone else have this problem?