Mk 3 C5 heater fan not working

[Lynnzer]

Took the car to Manchester airport in December where it was left a fortnight while we went on hols. All working fine when we parked, with no show of any problem prior to that either.
On return to car the heater fan just won't go. Damned inconvenient at this time of year, especially since we came home loaded with flu.
The fuses check out OK and the lights on the switches and aircon controls all in order.
Now, I doubt this is going to be the cause, but I have a very slow leak somewhere in my aircon that has proved damned difficult - impossible to trace so far.
Is it likely that if the pressure has completely gone from the system it will prevent the fan from working?
As I said, it doesn't seem possible, but Citroen being something of a one off for things like isn't beyond the pale.

Apart from that, any other suggestions would be welcome, especially any comments on where the fan actually is and any procedure to check it out.

[citronut]

i dont know how possible it is your air con could be the cause,
but the blower set up is like the 05 307 i would drop it out and check the plug connector going to the speed control module, which again if like the 307 it will be on the motor mounting,

as my friend 307 had over heated terminals in this connector, the first time i looked at it i just cleaned the pins up, and tightened the connectors in the plug,
this lasted for about six months, the second tome it failed i took the blower out and the owners friend soldered short lengths of wire to each pin on the speed control board and fitted a heavy duty plug connector

[Xantippa]

For the AC leak you should check the condenser. I had a very small leak on mine behind cooling fan, and according to Autobild -magazine it´s not very unusual on this model. If I remember correctly, there has also been leaks on the hose going to / coming from condenser. Btw, if the refrigerant is running very low, you don´t get cold air offside. Nearside works longer.

[bobins]

The blower itself will work if there's no gas in the aircon system, it's just that you won't get the aircon benefit ! Been there, done that. Both the condensor and the large flexi pipe going from the compressor are known weak points. When I had my system regassed, the aircon guy was surprised my pipe hadn't been replaced with the newer longer version - he considered it a case of when the old style pipe goes, not if it goes.

[Lynnzer]

Took car into local auto electrician's but after removing the glovebox panel he just couldn't locate the heater. He thinks it's above the actual glovebox bulkhead and couldn't manage to remove the pieces needed without potentially damaging them.
So, rang Citroen and they couldn't book me in for a week but gave me name of Co. who he sent another heater repair to last week.
On the way, I got the dreaded anti pollution fault again which cut the car out and wouldn't let it start up.
Even with the keys out of the ignition the warning light stayed on. So Green Flag was called with the intentions of taking me to the dealers.
When he arrived he disconnected the battery (which I would have done myself if I had a spanner in the car) and the motor started up on reconnection. The warning had been cleared.
In the meantime I had called the garage who was inline for doing my heater to tell him I wouldn't get there that day as I was having problems with the Anti Pollution system.
Now, here's the bit of interest to those with that particular problem, he gave me a number for a friend in the business who specialises in remedying this problem in all cars with that system.
From what I could gather, he disables the anti pollution altogether by either removing the filter or some other operation; he then sets the ECU chip to compensate and you never have any further anti pollution problems again. Of course you don't have an engine as clean as it was either but if it still passes the MOT who gives a damn?
The car's going in on Monday, weather permitting and he's going to do both the anti pollution and the heater. I really can't be arsed with tinkering with a heater that an auto electrician can't even get to.

I'll obviously report back on the success (or otherwise) of my experience at this garage but for those who want to look him up he's on this link:
http://www.northeastremaps.co.uk/DPF.html" onclick="window.open(this.href);return false;

[Xantippa]

It seems that the electrical connectors on MK3 C5 are not that good. I just had to make an additional grounding for my other rear light. Connector on rear light had melted a bit around ground pin, and rear lights were not working correctly. This connector is ridiculously small, and especially ground pin is tiny as needle.

[citronut]

again if like the 05 307 to access the heater fan remove the glove box 5 min job, then the heater fan is located to the right of the glove box aperture and almost against the bulkhead, rotate the base/mount (cant remember which direction ) then the fan comes out of the heater box,
you then have to maneuver it clear of all the gubins to get it out from behind the dash,