306 heater not working

dtmaudsley · Unread post by **dtmaudsley** » 07 Dec 2008, 15:16

hi all, basically the blower will not work on any setting, before i go ahead and get a new motor could it be anything else? it was making a weird noise and then packed up

AndersDK · Unread post by **AndersDK** » 07 Dec 2008, 15:26

Try get at the blower fan power leads.
Then connect directly to the battery for testing.

That will instantly tell if it is the blower motor or any speed controlling module at fault.

However the weird noise is a good indicator on worn out fan motor brushes ...

citronut · Unread post by **citronut** » 07 Dec 2008, 15:26

it is usualy the speed resistor pack,

regards malcolm

dtmaudsley · Unread post by **dtmaudsley** » 09 Dec 2008, 17:13

ok, had the blower out today and connected to the battery it works fine, i have now removed the resistor which was located under the scuttle panel, it looks ok but can anyone tell how i can test it? ( i'm new in the area of vehicle electrics!)

AndersDK · Unread post by **AndersDK** » 09 Dec 2008, 19:48

If it clearly is a resistor pack - not something power transistor look alike - then its simply a matter of testing with an ohm meter.
The ohmic value should range from some 3-5 ohms up to approx 10-20 ohms.
If defective it will be completely disrupted, no in-doubt or in-between values.

Using a couple of wires you may get away connecting the resistor pack in series with the blower fan, thus testing the resistor pack.
Usually there are a couple of connections on the resistor pack matching different speed settings (i.e. different ohmic values).

Beware ! The resistor pack gets real hot during use !
- if it works that is

If you are in a hurry and need a quick repair, then connect one wire of the blower fan directly to one of the headlamp wires, the other wire to chassis earth.
That will make the blower run as soon as you start the car and the dim/dip lights comes on.

dtmaudsley · Unread post by **dtmaudsley** » 10 Dec 2008, 14:11

ever since i removed the resistor the fan works on full speed so i'm guessing i have found the culprit... a new one on the way and an ohmeter just for the fun of it!

dtmaudsley · Unread post by **dtmaudsley** » 14 Dec 2008, 16:34

got the resistor today and hooked it up, now the fan doesn't work at all. before i got the resistor the old one had been disconnected while i was driving around for a few days and there was a slight electrical burning odour coming from behind the dash. i have yet to receive me ohmmeter so cant test anything yet, but the smell is worrying me. also there are no visible signs of burning

Unread post by **myglaren** » 14 Dec 2008, 17:01

Have you checked the fuses?

My son's 306 was blowing fuses, then smelled of burning. The fan motor is kaput. Not easy finding a replacement that isn't a brand new one @£200±

dtmaudsley · Unread post by **dtmaudsley** » 14 Dec 2008, 17:05

yeah checked all the fuses and they are fine

sparky33 · Unread post by **sparky33** » 19 Dec 2008, 17:39

If it has climate control, often the control panel overheats and this prevents proper operation as the contacts fuse together.

dtmaudsley · Unread post by **dtmaudsley** » 12 Jan 2009, 14:59

well this is a nightmare, i have now got a new fan, switch panel and resistor and the damn thing still doesn't work!
* the fan works connected to a battery
* when testing the red power lead to the fan it shows 12v on any earth
* both new and old resistors get hot when connected to power
* voltage readings change on both switch panels
* no visible signs of wire shorts, all fuses fine

so if there is power going to the fan, why does it not work in the car?

please somebody help me!!!

AndersDK · Unread post by **AndersDK** » 14 Jan 2009, 18:36

I believe you have a problem with a burnt out connector pin in one of the multi-connector plugs in your fuse box.

Arm yourself with a really good floodlight, so you can see whats going on in that birds nest of wires.
It may be (very) advantageous to spend the time removing the passenger seat to better access the wiring.

Better still - find an electrician amongst your friends ... 8)