406oc.co.uk

... questions Car is a 2003 406 HDI 90 Estate, I have the well documented heater blower issue and I think i have narrowed it down to the ignition switch, I have managed to ...

... her up and bled at both points but there is now only cold air from the heater.I took the pipes off at the heater matrix and flushed with a hose, brown water did come out but then ran clear.Still cold air from blower,any ideas?

... had the motor itself fail thought as you say. Fortunately it was the spare car that failed my wife's is still OK, I can't be doing without a good heater. :frown: Peter

I've said it before, there are only 3 usual suspects for a failed blower motor... 1 - Resistor under the passenger dash, a £20 eBay part but check the wires first as they sometimes melt... 2 - Ignition leads behind the barrel, also a £20 eBay part, can sometimes ...

Can be checked via pp2k, could be the resistor has died.
Quite a few have had it happen on the coupe forum.
There is some info in the 'how to' section

I had an intermittent blower on one of my 406's

Found it was the wiring from the back of the ignition switch,

If you drop the panel under the steering wheel and give them a wiggle you might find it starts and stops

Strangely the fault has disappeared for the present, I'm expecting it back any time though. I would think the most likely culprit is the power plug on the heater but have been to busy to look.

Peter

Yes it is I believe a full MUX, it's an 01 reg but seems to have been made in 02?. 110 Hdi LX. Our other one is an 01 GLX but appears to be only semi MUX I did make a reply with this info yesterday but the broadband failed just as I sent it. :x Thanks Steve and Doggy I will just have to work my way ...

Think Peter's is a fairly late model 110 HDi? Usual fault is the blower speed controller giving you permanent full speed, changed mine last year..... Fuses appear to be MF4 in the engine fusebox, then fuse 'F' on the side of the BSI, (assuming it's a full-mux ...

Sorry but I'm afraid you're going to have to remind me what flavour of 406 this one is

Completely dead, I suspect a fuse or as in the case of the XM the fuse holder self destructs, but I don't know where it is, probably under the bonnet but haven't looked - its cold out there.

Can anyone assist?

Thanks

Peter

I think they're on the blower motor. The pictures should still be available, you just need to find the links for them and view them on Bloatedfucker itself.

I'm not sure its that simple - although I'm no mechanic. The blower only works when the engine is running, so the 'engine running' relay needs the feed from the ignition first - before off to the blower. A new ignition lead is around £20 from eBay - I ...

... for a few weeks until they stopped again. This turned out to be a leaky heater matrix causing the air coming out of the blower vents to be very humid. This blows, as you might have guessed, directly over the lights ...

Hi there, welcome :cheesy: I have Peugeot wiring diagrams but for the heater they don't seem to be of much use as they don't seem to relate to anything (or even themselves). Control unit: http://i222.photobucket.com/albums/dd196/steve_earwig/2016/car%20parts/D9FM%20fsn%20control_zpsy0tzobr8.jpg ...