Climate Blower Motor will Not Shut Off (THE FIX IS LISTED BELOW)

T95 · Post by **T95** » 24 Feb 2018, 10:49

I would really appreciate some help!
2001 S60 and the climate blower motor decided it didn't want to shut off. Wife's car, and first time it happened she arrived at work, noticed the problem and thought it would shut off automatically. It apparently ran until the battery was drained so had to jump the car to get home. Best I could do was locate the fuse and pull it.

My assumption was that it was likely a relay, and not the resistor that I replaced last year. Searched for a wiring diagram but I could not find a Relay associated with the climate control system. So I plugged the fuse back in and systematically started pulling every relay, [starting in the engine compartment, trunk then under the dash], hoping to get the motor to shut off. It continued to run.

Questions:
Can anyone point me to a fix?

I would like to know how the system works, and a specific wiring diagram for my year and model. Unfortunately my copy of Vadis expired at the end of 2016 so I was forced to scour the internet for a wiring diagrams

Is the Climate Motor controlled through a relay? If so where is it located?

Are their any other sensors/ thermal switches in the system that may be causing this problem?

Could the heater resistor be the problem, is it hot regardless of key position

Post by **oragex** » 24 Feb 2018, 13:50

I had a customer coming with the same issue. I sold him a regulator and he said it's working fine now. To replace the regulator the cabin blower needs removed as well as the lower cover with two torx. You may be better to replace the whole blower with a new aftermarket unit at this point, even with a used one from Ebay

When replacing the blower if the new one doesn't work, try removing the blower fuse with the engine off

Post by **RickHaleParker** » 24 Feb 2018, 14:10

Only three things it could be ... Fan Control Module, Climate Control Module (CCM) or wiring from FCM to CCM.

T95 · Post by **T95** » 25 Feb 2018, 09:46

Wow, thanks for the same day responses!
To Oragex, the news your costumer had the same issue and it was resolved by changing the regulator is reassuring. Turns out I had the problem for a little over a week. Posted for help on the Volvo Forms site and never received a reply. So I decided to purchase another regulator figuring I would throw parts and time at the problem. Last regulator was a budget e-bay purchase, this time I got the bear.

T95 · Post by **T95** » 25 Feb 2018, 10:05

Rick, Thanks but I need some help interpreting the schematic.

First off terminology;
Fan Control Module- a search for this part only turned up the cooling fan / radiator FCM. Is this the one shown in the above schematic, or, does the climate system have its own FCM? If so where is it located?

Climate Control Module/CCM- is this the main interior control panel for the heater and air? Is it a cookie cutter part that can be replaced or does it need to be programed to the specific vehicle?

Out of the two components the FCM would appear to be the problem.

Still would like to know if the blower resistor is hot all the time or switched through a relay?

Post by **jtp** » 25 Feb 2018, 12:05

This might help: http://www.volvotips.com/index.php/850- ... ce-manual/

I’d agree the FCM for the blower motor is the most likely culprit, CCM malfunction would most likely cause other issues you’d think.

Seems weird for the same control module to control the engine cooling fan and blower motor but maybe it’s not weird if you’re anSwedish engineer.

Post by **RickHaleParker** » 25 Feb 2018, 16:44

Climate Control Module/CCM- is this the main interior control panel for the heater and air?

Correct

the climate system have its own FCM? If so where is it located?

The Climate Control System has it's own FCM, it is commonly called a "resistor pack" even know they went to Mosfets a long ago. For the 2001 S60, Vida refers to it a the "Power Unit" Volvo part number 8693262. It is located on the blower motor.

Post by **mrbrian200** » 25 Feb 2018, 19:28

There's something in the ignition switch to possibly consider as well. When I first bought my S60 (MY06) it had been sitting for somewhere between 4-8 months. Something was 'sticky' in the switch for a short while where sometimes the fan would run on unless I re inserted and removed the key a time or two (didn't need to turn the key, just insert and remove it). As I used and drove the car this behavior stopped after about a week and hasn't done it ever since. As I recall sitting inside the car everything else seemed to turn off (radio lights etc). There may have been other systems still receiving power but the main/obvious thing was the climate control fan.

T95 · Post by **T95** » 26 Feb 2018, 14:37

Problem Solved, it was the heater regulator. Power must be fed to it then to the control module. No indication of failure looking at the part and its connectors.
So the good news was I had a credit at FCP that i was not aware of so the new Behr regulator only cost me $14.
I also had the part out and back in in under 1hr 30 min. Figure more like three hours for your first time.

Now I not going to tell you about the other 45 min wasted looking for two glove box screws and the little dime size hold down for the side panel. Turned out it was hiding on top of the seat rail under the top slider. Still no sign of the screws, must be under the carpet.

The life saver is a flexible shaft for the 25T, no need to brake any tabs.

Don't buy the e-bay special like me. That regulator lasted just a little over a year! The ebay arrived in a box, no protection. The Behr regulator was sealed in a anti static wrapper and boxed securely.

I also cant thank all of you enough for your help, truly appreciated!

Post by **oragex** » 26 Feb 2018, 15:59

Well done. The only problem with the glove box screws is so you don't step on them one day

For future ref, the rear blower screws (in particular one of them) can also be reached using a small 25 torx tip (the tiny ones that slip on screwdrivers) which fits to a 1/4 imperial socket. My 3/8" ratchet set had already a 1/4 socket, it's a very small socket. Also helps to pull the floor mat under the blower