6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHAC Not Working
Leading reported evidence
Test supply
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
I've tested the supply to the compressor and its getting 0.5V, not enough to engage it.
Leading evidence: 'Test supply' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Set parameters' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
The AC was previously working, I don't know when it stopped working as its not really been used since it broke down in France back in Feb.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
He did mention something about if the car thinks the outside and inside temperature are outside the set parameters, then the compressor won't actuate.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
This could also be why the heater isn't directing heat in to the car until you set the temp up at 29 / 30???
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T060112Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Next on the list of items to fix is the AC on my 2005 C4S
The AC was previously working, I don't know when it stopped working as its not really been used since it broke down in France back in Feb.
Basically, the AC pump won't engage the clutch. It will if I give it a 12v supply so the compressor is good.
I've tested the supply to the compressor and its getting 0.5V, not enough to engage it.
The relay under the sub is clicking when I turn on the AC from the control panel. Pin 30 is not getting a supply, the other pins are.
This then leads back to the pressure sensor which I don't know how to test. Interestingly, the heating on the car only really gets hot when its at 29-30 degrees.
Not sure if these issues are linked, could the cabin sensor be faulty that is causing both issues?
Thanks
There could be a few different issues at play here. I remember demort once talking about how the aircon system activates. He did mention something about if the car thinks the outside and inside temperature are outside the set parameters, then the compressor won't actuate. This could also be why the heater isn't directing heat in to the car until you set the temp up at 29 / 30???
Sounds to me like a relay issue if you can hear the relay clicking but I could be wrong.
If you are able to actuate the compressor manually with the car running, you could do this and feel for the low pressure pipe (the one on the right of the 2 in the engine bay feeding to the compressor) going cold. This would identify that you have enough gas in the system or not so you could rule out the pressure switch. I wouldn't do this for more than a minute or so though to prevent any damage if the system is empty.
