Air con again!!

[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 But given the prices of originals I wouldn’t be surprised it has been replaced by an aftermarket one.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]

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.

[GiveMeABreak]

Part number: 6460T9 (7.65 interior diameter)

[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]

[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]

. I own up!

[Jetjockey]

That’s interesting. Does the Grand Picasso have two evaporators?

[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!

[GiveMeABreak]

That’s interesting. Does the Grand Picasso have two evaporators?

No, but they can be different thicknesses and sizes.

[Yaty75]

Hi! I need help! The mechanic put in 450 grams of refrigerant and a new compressor in my Citroen C4 Grand Picasso 1.6. I've been looking for information for days... I don't know if it really takes 450 grams or 675 grams. I can't find the sticker that indicates it. My car has refrigerant pumps in the front and back, but the back ones aren't digital; they're rotary. I think it only has one evaporator, not two. I'm not sure.

But it's not cooling enough, and the fan doesn't kick in at full speed. The engine is overheating. Can you help me with the VP number?

[PaulC5]

I replied to your other post here viewtopic.php?t=82678 but you need to check if it has 2 evaporators, if so there will be pipes going to the back one. If you post your vin somebody may be able to find the car characteristics (build sheet) which should say if it has 2 evaporators.

The engine fan not running at full speed might need a diagnostic.