2005 C5 Dual Climate Control Problem

[shig56]

hi, i have a 2005 c5 with dual climate control. passengers side is stuck on cold and drives side is stuck on luke warm. im aware this is a common fault on them with the gears breaking on the heater flap motors. is their a mod for these motors cause i dont want to put second hand ones in for them to break again?

[MichaelDavis]

No mod I know of. I've just replaced the flaps inside my heater box - took dashboard out, took heater box out then split it and put new flaps in which are strengthened from the manufacturer lubed them all up and put everything back together - all works perfect now. Took me 2 days taking my time but very rewarding.

[paul.h]

Welcome to the forum.

Some info from the Technical section pinned Common Problems topic:

 

10. The air conditioning only gives cold air at one side or does not cool much.

The evaporator matrix cooling the air on the C5 is long and if the amount of refrigerant is low then there will not be enough to cool all the matrix for both sides of the cabin. First step should be a regass then if that does not work and there are no leaks then look at replacing the air flap control motors. A regass may be about £50, a flap new motor about £60. It could also be damage to the air flap shaft motor fitting - see this post http://www.citroen-o...c5-2002-aircon/ . I had to have both C5s regassed when about 7 years old, on the second one there was a printout that showed there was only 93 g of refrigerant left and that 525 g were put back in yet the air con was working and gas could be heard going through the pressure control valve but the air was not cooling much.

 

Also have a look at this topic for a possible fix to a broken heater flap connection http://www.citroen-o...or-air-bag-ecu/

 

Have a look at this topic for alternative ways to fix the broken flap connection by extending the motor spindle using one from another motor or buying a motor already with an extended spindle http://www.citroen-o...ulation-aircon/

 

Have a look at this topic for a case where a new comms 2000 unit fixed the manual air con not working http://www.citroen-o...-manual-aircon/

 

In the May 2015 Car Mechanics magazine there is an excellent article by Rob Marshall where he dismantles a 2004 to 2008 C5 heating system with climate control to replace broken heater flaps (the shaft on one had broken completely and the other was breaking). This involves removing the dash and then the heater unit from the car and then fitting new flaps from a dealer (6480E3 for dual zone and 6480E4 for mono system, both £58.53). There are 63 photos showing all the steps.

[MichaelDavis]

I bought that Car Mechanics magazine from Ebay and can highly recommend it - wasnt completely accurate eg wrong size torx quoted for radio removal but you get the general idea of how to remove dash, heater, take heater apart fit new flaps and put it all back together- took me 2 days taking my time including buying a few tools i didnt already have and then you need to get aircon re gassed- i didnt fit new aircon seals as existing ones looked fine just lubed them up as advised by aircon engineer and i got a perfect working aircon system again- Four tips :

 

one -  buy plastic trim removal tools from Ebay in advance -only cost a few quid and are perfect for doing this dashboard job 

 

two - have aircon de gassed day before you intend to remove dash and heater

 

three- make sure you have some masking tape to wrap around wires and write on - much easier to put everything back in correct place as some wires do actually fit in other places though you will get some funny electrical problems if you put them in wrong place - yes i did do this by mistake but my excuse was i had just done 60hours at work that week and was a tad tired but no damage done and easily sorted.

 

four- if your antifreeze has never been touched from factory then when you remove heater matrix catch antifreeze in a clean bowl to reuse- you cannot buy this antifreeze anywhere as its only available to the manufacturer- its golden in colour almost clear-it will save you about a tenner too- any spills you can top up with Citroen longlife antifreeze.

Edited October 19, 2016 by MichaelDavis