Heater Blower can't be switched off

Clogzz · Post by **Clogzz** » 01 Jul 2007, 13:05

After all the work you’ve done, there’s ‘better the devil you know’ and all that.

Also all as per Peter and Jim … the blower is on when you turn the key because the supply gets connected when you turn the key, irrespective of whether the relay modification in the blower supply has been done or not.
Normally, the electronic drive starts the motor, but with a shorted drive, it turns all the time.
The plug into the blower motor can be disconnected to stop the fan without removing any fuse.
Recent stories here:

http://www.frenchcarforum.co.uk/forum/v ... hp?t=21758

http://www.frenchcarforum.co.uk/forum/v ... hp?t=21880

Post by **CitroJim** » 01 Jul 2007, 13:07

MikeT wrote:By the way, do you know of any easy way to temporarily disable the blower other than removing the fuse?

Simplest method I know Mike, it to unplug the connectors from the blower motor

MikeT · Post by **MikeT** » 01 Jul 2007, 23:02

wheeler wrote:Your probably right on that one, also check the 30 pin brown connector in the footwell too, check that the pins in it aint corroded.

Hi wheeler, thanks for the tip. As it happens, I usually do have a good look around as there's always something to be learnt.

MikeT · Post by **MikeT** » 01 Jul 2007, 23:15

Clogzz wrote:After all the work you’ve done, there’s ‘better the devil you know’ and all that.
....
The plug into the blower motor can be disconnected to stop the fan without removing any fuse.

I have to admit, I'm not the man to save this one.

I'll pull the plug tomorrow, I think I've seen DIY-looking crimps on the end of a few fat single wires going to the blower. That'll be after I've read the links you've so kindly provided. Thanks

MikeT · Post by **MikeT** » 01 Jul 2007, 23:18

citrojim wrote:Simplest method I know Mike, it to unplug the connectors from the blower motor

Yeah, I thought the same too Jim, just checking 8)

MikeT · Post by **MikeT** » 01 Jul 2007, 23:21

Overedited methinks, can't see why though

AndersDK · Post by **AndersDK** » 02 Jul 2007, 01:26

missing end "

MikeT · Post by **MikeT** » 02 Jul 2007, 13:23

Thanks AndersDK

MikeT · Post by **MikeT** » 02 Jul 2007, 16:59

Of the fattest wires to the blower, two were red, no connectors, just single crimps on all wires - someone's been here before - pulled the nearest red and fan doesn't work anymore - hoorah!

Carpet is still soaked, as to be expected. Scuttle is broken in no less than five places - if it's easy to remove I might have a laugh with some superglue and sealant or something.

Post by **admiral51** » 02 Jul 2007, 18:12

MikeT wrote:
Carpet is still soaked, as to be expected. Scuttle is broken in no less than five places - if it's easy to remove I might have a laugh with some superglue and sealant or something.

not too sure on ease of removal but when it goes back in it needs to be really well sealed
try using mastik to seal to windscreen. you can get it on a roll about an inch wide. i get it from a caravan dealers/repairers think its about £1 a metre or less.they call it chewing gum and it works really well.
colin

MikeT · Post by **MikeT** » 03 Jul 2007, 20:26

Got in the car today and saw drips falling onto carpet again. I was intending to pull the scuttle off and superglue the cracks/splits then seal it in place with silicone sealant. I can see now why it's been damaged - some neanderthal has obviously levered the wiper arms off instead of simply pulling them off at some time.

In the end I quickly beaded the join to the screen with sealant... and not a moment too soon as we got torrential rain, hailstones, thunder and lightning overhead.

I put dry newspaper in the passenger footwell and not one drop appeared for the next 30 minutes of rain.

I know it's not a perfect seal and may not last but it's definately an improvement and with Citroen parts quoting me £62 for a new scuttle

I think I made the right choice.

MikeT · Post by **MikeT** » 04 Jul 2007, 15:58

After being rained on most of yesterday and this morning I'm pleased to report water no longer leaks over the fan blower. The newspaper laid under the blower was still bone dry at lunchtime today.

I removed the three screws holding the blower in place (one was rusty) and disconnected the wiring the pulled the assembly free.

To get at the pcb, I think I need to remove the vaned drum/cylinder but it looks like a press fit - no clips or washers holding it on. Additionally, the shaft it's on has surface rust too.

Does it have to be foreced off? If so, it looks like a bearing puller is needed and leverage points don't look strong enough.

Anybody got any tips for me please?

MikeT · Post by **MikeT** » 04 Jul 2007, 16:22

Clogzz wrote:

So much information around I overlooked the obvious - how did you seperate the two halves - blower motor from it's housing? I was thinking I had to remove the vaned drum

MikeT · Post by **MikeT** » 04 Jul 2007, 16:47

Cancel that, it's apart now, just pull the connector grommet off, pull the main connector out and using a lever, push it out from underneath.

Easy when you know how

MikeT · Post by **MikeT** » 06 Jul 2007, 16:55

Thanks everyone and an especially big thank you to that kind man citrojim, my blower is now back in place and working as it did, possibly a bit better as it's been cleaned and lubricated too. $\:D/$

Fixing the rain leaking in was a priority and a bead of silicone sealant cured that just fine, then I replaced the blower transistors as per forum advise - I wouldn't have been able to do it all without you, I'm sure!