Ventilation problem
Moderator: RichardW
Ventilation problem
Hi guys, just moved on from a very early (93) Xantia 2.0 SX which I'd grown to love and hate in equal amounts over the years, to a late (99) Xantia 2.0 Exclusive with aircon and all the toys. No more sinking to the ground on switch-off!
Starting to find the little problems you don't notice until you've driven it a bit. The disadvantage of having more toys is there's more to go wrong!
Most I can sort, but there's a problem with the ventilation /heater system. I get heat (matrix ok) and the blower works ok, but no matter which position I move the ventilation slider to I can't get air through the screen vents or into the footwells. I only get heat out of the face level vents, which means I've got no demist and cold feet as well. Any ideas?
Is the ventilation slider a mechanical linkage or is it servos? If it's electrical could it be affected by the dreaded ignition switch failure?
Anyone else had this? Any help would be appreciated, although I'm already mentally resigning myself to having to take the dash out.
Starting to find the little problems you don't notice until you've driven it a bit. The disadvantage of having more toys is there's more to go wrong!
Most I can sort, but there's a problem with the ventilation /heater system. I get heat (matrix ok) and the blower works ok, but no matter which position I move the ventilation slider to I can't get air through the screen vents or into the footwells. I only get heat out of the face level vents, which means I've got no demist and cold feet as well. Any ideas?
Is the ventilation slider a mechanical linkage or is it servos? If it's electrical could it be affected by the dreaded ignition switch failure?
Anyone else had this? Any help would be appreciated, although I'm already mentally resigning myself to having to take the dash out.
Eventually got round to checking the linkages. Took out the radio and was able to get at the back of the ventilation slider. Cables are ok, they are still attached to the slider mechanism and I was able to squeeze my hand in to trace the cables and confirm that they are still attached at the other end. Operated slider and both cables move their respective plastic levers at the other end. All appears to operate as it should, but still no air to screen or feet. Can only think it must be an internal blockage in the air distribution box. Checked the pollen filter whilst I was at it and it was absolutely filthy, but the fact that it was in place (even though it was full of crap) should mean that nothing was able to get through it to block the ventilation pipes? Looking more and more like a dash-out job to fix now.
Re: Ventilation problem
shaker wrote:If it's electrical could it be affected by the dreaded ignition switch failure?
A Xantia of 99 era has the modifed/better ign switch
Ian
Account Ref: 6419
Current Cars
Nissan X-Trail SVE
Saab 2.2TiD
Merc E270 Estate
Past Citroens
2001 Xantia 3.0 Exclusive
1999 Xantia 1.9TD
1997 Xantia 3.0 Exclusive
1995 XM 3.0 Exclusive Estate
Account Ref: 6419
Current Cars
Nissan X-Trail SVE
Saab 2.2TiD
Merc E270 Estate
Past Citroens
2001 Xantia 3.0 Exclusive
1999 Xantia 1.9TD
1997 Xantia 3.0 Exclusive
1995 XM 3.0 Exclusive Estate
- xantia_v6
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1997 Citroen Xantia V6 (France)
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I have got a heater assembly from a Xantia sitting beside me now, and looking at the various flaps and things, I think that I can see what your problem must be.
There are 3 mechanical cables from the control panel, one is the recirc control, which we will ignore. One of the others goes to a grey pastic arm on the heater box, and operates a flap that divides air between the screen and footwell outlets.
The last cable goes to a blue pastic arm, and controls a flap that divides the air between the facia outlets and the flap mentioned above. If this flap is stuck closed, there will be no air to footwell or screen.
To complicate things slightly, the arm that this last cable is connected to is not directly connected to the shaft of the flap, but is pivoted about 20mm from the axle of the flap, with plastic gear teeth connecting the arm to the flap axle.
So if this arm is not moving, or the gear teeth are damaged, then the flap will not move, and no air gets past the flap.
I don't know if you can see the blue arm and grey gear with the heater controls and radio removed. if so, you may be abloe to see why the flap is not moving.
There are 3 mechanical cables from the control panel, one is the recirc control, which we will ignore. One of the others goes to a grey pastic arm on the heater box, and operates a flap that divides air between the screen and footwell outlets.
The last cable goes to a blue pastic arm, and controls a flap that divides the air between the facia outlets and the flap mentioned above. If this flap is stuck closed, there will be no air to footwell or screen.
To complicate things slightly, the arm that this last cable is connected to is not directly connected to the shaft of the flap, but is pivoted about 20mm from the axle of the flap, with plastic gear teeth connecting the arm to the flap axle.
So if this arm is not moving, or the gear teeth are damaged, then the flap will not move, and no air gets past the flap.
I don't know if you can see the blue arm and grey gear with the heater controls and radio removed. if so, you may be abloe to see why the flap is not moving.
Thanks for that xantia_v6, I can see the blue plastic arm and the cable moves it when the slider is operated. Didn't know it wasn't directly connected to the shaft on the flap though, as you rightly say if the gear wheel is damaged the flap won't move even if the arm does. I'll check it in the morning and see if I can see the gear wheel and I'll let you know if it's that. Thanks again for your help.
Cost me some skinned knuckles but thanks to xantia_v6 I've now got air to the screen and to my feet!
Couldn't see the gear wheel but could see that the blue plastic arm had a pin on it that looked like it should locate in a slot on a white plastic cam that I could also see, which is presumably connected to the gear wheel. Trouble was, the pin looked to be about half an inch above the slot so when the blue arm moved, the pin couldn't move the white cam because it wasn't located in the slot. Reached in and eventually managed to move the white cam towards the blue arm so that the pin located. Switched the heating on and tried moving the slider and hey presto! hot air to the screen!
I've operated the slider back and forth plenty of times and touch wood everything now works as it should. Don't know whether the white cam will eventually move away from the pin again but it seems ok for now.
Couldn't see the gear wheel but could see that the blue plastic arm had a pin on it that looked like it should locate in a slot on a white plastic cam that I could also see, which is presumably connected to the gear wheel. Trouble was, the pin looked to be about half an inch above the slot so when the blue arm moved, the pin couldn't move the white cam because it wasn't located in the slot. Reached in and eventually managed to move the white cam towards the blue arm so that the pin located. Switched the heating on and tried moving the slider and hey presto! hot air to the screen!
I've operated the slider back and forth plenty of times and touch wood everything now works as it should. Don't know whether the white cam will eventually move away from the pin again but it seems ok for now.
Hi all,
I have the same problem with the ventilation on my mkII Xantia. No air at all coming from any vent.
I have tried what V6 has suggested. The cables are all connected and the blue lever moves the 'cog' part too. I can hear what sounds like parts moving within the ventilation system.
Any ideas please because it is really getting me down now and it is really freezing too
I have the same problem with the ventilation on my mkII Xantia. No air at all coming from any vent.
I have tried what V6 has suggested. The cables are all connected and the blue lever moves the 'cog' part too. I can hear what sounds like parts moving within the ventilation system.
Any ideas please because it is really getting me down now and it is really freezing too
1xAmi,3xGS,2xBx,2xAX,2xSaxo,1xXantia mk I,2xXantia MkII,1xC1,2xC2,
Hi Anders,
No, the polarity is ok.
It must be a vent flap thats stuck.
That must mean a dash strip down unless i can drill a hole in the casing somewhere and poke a straight metal bar in to release the flap?????
Ideas please... PLEASE
Paul
No, the polarity is ok.
It must be a vent flap thats stuck.
That must mean a dash strip down unless i can drill a hole in the casing somewhere and poke a straight metal bar in to release the flap?????
Ideas please... PLEASE
Paul
1xAmi,3xGS,2xBx,2xAX,2xSaxo,1xXantia mk I,2xXantia MkII,1xC1,2xC2,
The air-conditioned cars have a motorised flap at the bottom front of the centre console, and the drive cog breaks:I can hear what sounds like parts moving within the ventilation system.
http://www.frenchcarforum.co.uk/forum/v ... hp?t=21859
2002 C5 2.0i AL4 230,000 km 76372389