Air Conditionar Fail C5 X7 1.6

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

Moderator: RichardW

Tiagovp
Posts: 42
Joined: 16 Jan 2020, 17:15
x 2

Air Conditionar Fail C5 X7 1.6

Post by Tiagovp »

Hello everyone. I need help. I have a malfunction in the air conditioning system of my C5 1.6hdi. Pressing the AC button turns on the light but does not activate the AC compressor. in this case the electric clutch. I checked the clutch making the direct connection of the battery and it works. I checked with a multimeter the plug that feeds and does not have the necessary voltage to work. I would ask for help so that they can present me the electrical scheme of the AC or if you have any more suggestions send me please.
Best regargs
User avatar
GiveMeABreak
Forum Admin Team
Posts: 38747
Joined: 15 Sep 2015, 19:38
x 6055

Re: Air Conditionar Fail C5 X7 1.6

Post by GiveMeABreak »

The compressor will disengage if the gas is low amongst other faults. It is a safety feature to protect the compressor if there is little or no gas in the system.

Before you start ripping everything out, check the obvious things like leaks. It's easy for a stone chip to puncture the condenser radiator (which is very fragile) or for there to be a leak in a pipe. I would get it to a garage that has the correct testing and re-gassing equipment. They should be able to test the system for leaks and check the gas and oil levels.
Please Don't PM Me For Technical Help

Marc
Tiagovp
Posts: 42
Joined: 16 Jan 2020, 17:15
x 2

Re: Air Conditionar Fail C5 X7 1.6

Post by Tiagovp »

Thanks Marc.
The summer in Portugal is comming and I have to repair this important piece !! Best regards
User avatar
xantia_v6
Forum Admin Team
Posts: 9251
Joined: 09 Nov 2005, 23:03
x 880

Re: Air Conditionar Fail C5 X7 1.6

Post by xantia_v6 »

The engine ECU will also disable the compressor if some abnormal conditions are detected, you really need to get the fault codes read.
Tiagovp
Posts: 42
Joined: 16 Jan 2020, 17:15
x 2

Re: Air Conditionar Fail C5 X7 1.6

Post by Tiagovp »

Hello everybody.
I already have the situation resolved. there was no gas pressure in the air conditioning circuit.
New gas was loaded and it works normally now.
Thanks for the help.
Best regards
ozvtr
Posts: 473
Joined: 13 Oct 2020, 01:11
x 145

Re: Air Conditionar Fail C5 X7 1.6

Post by ozvtr »

Tiagovp wrote: 17 May 2023, 11:35 there was no gas pressure in the air conditioning circuit.
New gas was loaded and it works normally now.
Be prepared for the system to fail again. While slow leaks over a long time are "tolerated" it's not the way the system is designed!
The cost of tracking down and fixing the leak Vs just re-gassing the system constantly over time can sometimes be the same. But which of those is the right thing to do?
If it stops working again you'll know why.
Tiagovp
Posts: 42
Joined: 16 Jan 2020, 17:15
x 2

Re: Air Conditionar Fail C5 X7 1.6

Post by Tiagovp »

ozvtr wrote: 18 May 2023, 00:04
Tiagovp wrote: 17 May 2023, 11:35 there was no gas pressure in the air conditioning circuit.
New gas was loaded and it works normally now.
Be prepared for the system to fail again. While slow leaks over a long time are "tolerated" it's not the way the system is designed!
The cost of tracking down and fixing the leak Vs just re-gassing the system constantly over time can sometimes be the same. But which of those is the right thing to do?
If it stops working again you'll know why.
Hello, I hope there are no more surprises...
My car it´s from 2009 and I bought at 3 years ago with 79.000 Klm´s. I presume that in these 14 years never took a gas refill.
The summer is comming and I hope he can handle it.
User avatar
osx
(Donor 2022)
Posts: 770
Joined: 08 Jun 2013, 20:09
x 14

Re: Air Conditionar Fail C5 X7 1.6

Post by osx »

Is it easy to replace the condenser (i.e. without having to remove bumper etc)?
C5 X7 Exclusive 2.0 HDi Auto
C5 X7 Exclusive 2.0 HDi Manual
User avatar
GiveMeABreak
Forum Admin Team
Posts: 38747
Joined: 15 Sep 2015, 19:38
x 6055

Re: Air Conditionar Fail C5 X7 1.6

Post by GiveMeABreak »

After vacuuming out the A/C system first (essential), the bumper and cooling radiator need to be removed. Then the A/C pipes have to be removed and the outlets plugged to avoid humidity getting into the circuit.
Please Don't PM Me For Technical Help

Marc
User avatar
osx
(Donor 2022)
Posts: 770
Joined: 08 Jun 2013, 20:09
x 14

Re: Air Conditionar Fail C5 X7 1.6

Post by osx »

It has been vacuumed. I was hoping it could be pulled out from the top as the cooling radiator can be pushed back towards the engine leaving a gap for the condensed to be pulled out.

Can't believe I posted the same in 2015 :rofl2:

https://www.frenchcarforum.co.uk/forum/ ... 3&start=15
C5 X7 Exclusive 2.0 HDi Auto
C5 X7 Exclusive 2.0 HDi Manual
User avatar
osx
(Donor 2022)
Posts: 770
Joined: 08 Jun 2013, 20:09
x 14

Re: Air Conditionar Fail C5 X7 1.6

Post by osx »

It was a pain but managed to replace it without having to remove the cooling radiator. Interestingly the leak on the the old condenser was at the radiator side and not the front side which is the exposed side (that's probably why they couldn't see the leak).
C5 X7 Exclusive 2.0 HDi Auto
C5 X7 Exclusive 2.0 HDi Manual