Air con again!!

This is the Forum for all your Citroen Technical Questions, Problems or Advice.

Moderator: RichardW

User avatar
GiveMeABreak
Forum Admin Team
Posts: 29049
Joined: 15 Sep 2015, 19:38
x 3614

Re: Air con again!!

Post by GiveMeABreak »

I’m on my second one. Had it done under warranty a few years ago. But given the prices of originals I wouldn’t be surprised it has been replaced by an aftermarket one.
Jetjockey
Posts: 129
Joined: 02 Jun 2019, 22:15
x 3

Re: Air con again!!

Post by Jetjockey »

Yes, I wouldn’t be surprised!

Marc, would you have the part number for “O” ring number 8 in Table A that you posted on page 1 of this thread.

Thank you.
User avatar
GiveMeABreak
Forum Admin Team
Posts: 29049
Joined: 15 Sep 2015, 19:38
x 3614

Re: Air con again!!

Post by GiveMeABreak »

Part number: 6460T9 (7.65 interior diameter)
Jetjockey
Posts: 129
Joined: 02 Jun 2019, 22:15
x 3

Re: Air con again!!

Post by Jetjockey »

Update.

Condenser turned up from the factors and after comparing with the one removed (Valeo) it seemed a perfect fit in both form and function with no fettling required for fitting. Fitted new O rings to bottom pipe (Thanks Marc) and transferred over the pressure sensor as Citroën wanted £132 for a new one 😳.
We then vacuumed the system and the vacuum held perfectly for an hour. We then charged the system with 530 grams of R134a and fired it up. Within a minute icy cold air flowed which continued during an extended test drive.

Now the burning question:- Why does my particular engine type only require 530 grams but the other 2 Ltr Hdi engines require 630 grams? Can anybody shed any light on this puzzle? 🤔

Thank you. 😃
Jetjockey
Posts: 129
Joined: 02 Jun 2019, 22:15
x 3

Re: Air con again!!

Post by Jetjockey »

5AB5BC97-4D2B-49B6-B7C2-16F8D5EA369D.jpeg
2E403DA2-3361-4342-B856-198AD62B2B92.jpeg
User avatar
GiveMeABreak
Forum Admin Team
Posts: 29049
Joined: 15 Sep 2015, 19:38
x 3614

Re: Air con again!!

Post by GiveMeABreak »

So you filled up with 5 more Grams than recommended! Maybe she'll let you off on that one...

Regarding capacities - it's not about engine size. The DS5 is 450 regardless of engine, the X7 Euro 4 engines except the DW10BTED4 are 625, including the 2.7 and 3.0 engines, but the C4 Picasso is 450 for manual A/C on all models and 675 for those with additional A/C (for rear passengers like the Grande Picasso for example.

So it's down to the Euro standards and specific models I think.
Jetjockey
Posts: 129
Joined: 02 Jun 2019, 22:15
x 3

Re: Air con again!!

Post by Jetjockey »

😳😳😬😬🙄🙄. I own up!
Jetjockey
Posts: 129
Joined: 02 Jun 2019, 22:15
x 3

Re: Air con again!!

Post by Jetjockey »

That’s interesting. Does the Grand Picasso have two evaporators?
Jetjockey
Posts: 129
Joined: 02 Jun 2019, 22:15
x 3

Re: Air con again!!

Post by Jetjockey »

Hmmmm. It doesn’t seem as cold on 530 grams, but looking at the pictures below......
29°C outside and 7.5°C coming from the vents, a loss of 21.5°C across the evaporated. Not too shabby! :-D

403FC5A7-2BEB-4084-812D-C3EE2B4DA564.jpeg
3BC59BD2-B07A-466F-B631-D215F834C0DB.jpeg
User avatar
GiveMeABreak
Forum Admin Team
Posts: 29049
Joined: 15 Sep 2015, 19:38
x 3614

Re: Air con again!!

Post by GiveMeABreak »

Jetjockey wrote:
29 Jun 2019, 01:06
That’s interesting. Does the Grand Picasso have two evaporators?
No, but they can be different thicknesses and sizes.