C5 Climate Control

[agosling]

I have a problem with the air conditioning on my C5, the passenger side is blowing hot air regardless of the temperature setting, the drivers side works correctly. This is a real problem as I live in Queensland, Australia, and it gets very hot and humid in summer. Have been told it will cost me $1060 plus fitting for a heater evaporator assembly (6450 HS), to fix the problem but I am investigating further before I commit to that. Does anyone have any prior experience, information or suggestions regarding this problem?
Thanks

[Peter.N.]

I am not familiar with the C5 system but I would suspect that each side has a flap controled by a servo motor and that the passenger side is not working. On the XM the motor is under the glove box and is quite easy to change and not to expensive.

[wheeler]

if its the mixer flap motor im pretty sure both sides are identical so you would be able to swap them side to side & see if the problem moves to the other side. sounds like its more likely to be damaged gears though.

[agosling]

Thanks for the assistance, I am sure now that it is the gear teeth that turn the flap that controls the distribution are stripped and the flap is stuck in the hot position. No doubt the parts cost far more here than in Europe.
Very grateful for the quick response.

[agosling]

Final:
It was the flap control teeth that were stripped and that requires a heater evaporator assembly (6450 HS) to be fitted, hence the price.
Thanks again to all who responded.

[Clogzz]

A heater evaporator ?
It’s either a heater matrix ... radiator, or an air conditioning evaporator, separate from the flap motor, at least on the XM and Xantia.
It does work normally on the driver's side, so it's only an air flow problem, not an air conditioning fault.

Some context here, 4 pages:

http://www.frenchcarforum.co.uk/forum/v ... hp?t=21859

Ian Reddiex of Euroserve, 36 Ross Street, Newstead, Tel 3852-1399 would be someone credible.