C5 MK II Blower Motor

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nonnus
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C5 MK II Blower Motor

Post by nonnus »

Hello... Well.... my blower motor also stop working (winter time, best time to stop working)... my is the C5 mk II (2004 facelift)... What is strange is that I still hear some very faint noises only when I turn on and when I turn off the ventilation. Is it possible to be the also just the Blower Control Module?? Or the motor itself?? And where is the location of those??
Last edited by GiveMeABreak on 05 Jan 2022, 11:24, edited 1 time in total.
Reason: Split into new topic as not relevant to C5 X7
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Paul-R
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Re: C5 MK II Blower Motor

Post by Paul-R »

If the Mk2 is the same as the Mk1 then there is a segmented indicator amongst the heater controls showing how fast the fan motor should be spinning at. IIRC (it was quite a few years go) when I switched the ignition on in my Mk1 the indicator would show a number of segments for a few seconds while the system tries to spin the motor up and then clear them when the motor doesn't spin. Does yours do that?
ml11ML
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Re: C5 MK II Blower Motor

Post by ml11ML »

It might also be smart to check the engine bay fusebox blower fuse before taking apart anything else... Last week my blower stopped and I found that the fuse had black contacts and was partially melted (the plastic shell, it didn't actually pop the fuse itself). After cleaning it works well again.
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Gibbo2286
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Re: C5 MK II Blower Motor

Post by Gibbo2286 »

My previous C5 had this trouble, I bought and fitted a control for it but it wasn't fixed, that turned out to be a melted under bonnet fuse board, resistance in a poor connection causes the fuse to heat up and melt the plastic around it.
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nonnus
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Re: C5 MK II Blower Motor

Post by nonnus »

Thanks for the answers... Well... A little update... My blower still works, or I might say "kinda" works... When I start the car I turn on the blower, and it works... but sometimes after a while it turns off after a few minutes, can be 5, can be 10 or 20 minutes (the fan on display info still has the blades on) and I sense some air coming like the circuit still opened... I've tried to search on the dash about the resistor, but I can't find it, not the left nor the right side... Assuming I know the shape of the resistor... :?: :!: :? :?
Through some research at Service box and the web... I found this: Image
see numbers 3 and 11... the image seams, they are the same unit.

But I think they are not because number 3 (6441T6) looks like this: Image
and I think this is the right one.


What is strange is that the other reference number 11 (6441L2) is supposedly this: Image
but I'm pretty sure that this one is wrong...
ml11ML
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Re: C5 MK II Blower Motor

Post by ml11ML »

My mk1 has the one in the second picture for sure (number 11) as I had to replace it last year. It was located on the right side of the car (with glove box removed looking through the hole way back to the firewall and at the bottom) and was held in to the blower box with 2 screws. There are really thick cables going into it so it's pretty hard to miss. On mine the connectors were all melted as well (apparently a known fault with these?) so I had to solder the wires on to the new one.

No idea if they changed it for the facelift but it's worth a look.
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Paul-R
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Re: C5 MK II Blower Motor

Post by Paul-R »

The first resistor pack (the simpler one) is fitted to cars with manual air conditioning. In RHD cars it is situated (in the Mk1, probably also Mk2) in the passenger (LH) footwell on the right in the heater unit.

The second one with the aluminium fins is a control pack and is more complicated than just a bunch of resistors. It is fitted to Mk1 cars (probably Mk2 as well) with automatic air conditioning (climate control). In RHD cars it is situated in the RH (driver's) footwell on the left.
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Paul-R
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Re: C5 MK II Blower Motor

Post by Paul-R »

ml11ML wrote:
06 Jan 2022, 23:15
My mk1 has the one in the second picture for sure (number 11) as I had to replace it last year. It was located on the right side of the car (with glove box removed looking through the hole way back to the firewall and at the bottom) and was held in to the blower box with 2 screws. There are really thick cables going into it so it's pretty hard to miss. On mine the connectors were all melted as well (apparently a known fault with these?) so I had to solder the wires on to the new one.

No idea if they changed it for the facelift but it's worth a look.
My Mk1 was exactly like that. the first time it went wrong I was able to remake the connections. The second time I had to change the control unit as well as repair the connections.
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Paul-R
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Re: C5 MK II Blower Motor

Post by Paul-R »

To confirm the position of the two types of speed regulator / resistor / control unit. They are in exactly the same position in the car - RH footwell for finned type, LH footwell for simpler resistor type. Being RHD or LHD makes no difference to this, just alters the difficulty if you have brake pedals in the way or not!
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nonnus
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Re: C5 MK II Blower Motor

Post by nonnus »

After seeing some pictures and response... It's not very hard to locate it... I went to look again for the location of the resistor (both left and right side) and I really didn't find out any of the above pictures resistors and connections... I forgot to take pictures for your appreciation... I must take some pictures to show you that really is a mystery for my Mk2 C5 and (not a mystery to Mk1)...