AC stopped working

[~Rich~]

Hi all,
Had my alternator replaced yesterday by an indie.
Now today AC is no longer cold.
Is there a chance they left something not plugged in?
Cheers Rich

[PerthDisco]

Hi all,
Had my alternator replaced yesterday by an indie.
Now today AC is no longer cold.
Is there a chance they left something not plugged in?
Cheers Rich

Nothing relates other than the serp belt however get gas level checked before you panic.

[BradC]

If for whatever reason the compressor was unplugged you should see faults logged. The SDV6 has a clutch in addition to the displacement valve, so you have 2 devices that would leave unhappy fault codes if there was a physical issue. If you have a GAP it'd pay you to look at the system pressure. That's a pretty good indicator for go/no-go on the compressor and a telltale if there is insufficient gas.

[~Rich~]

Screenshot_2024-08-28-14-46-34-529_com.gap.iidcontrol | Flickr (https://flic.kr/p/2qcFW6F)

Well the readings are unavailable 😔
No faults though.

[veebs]

Screenshot_2024-08-28-14-46-34-529_com.gap.iidcontrol | Flickr (https://flic.kr/p/2qcFW6F)

Well the readings are unavailable 😔
No faults though.

Sorry to ask a dumb question - was the engine running when you took the screenshot?

[~Rich~]

Yes!
Ignition on and engine running!

[~Rich~]

Ok
Well it was a coincidence!
AC was only about 50% charge and that stopped it working.
The IIDTool didn't show the HVAC readings because it was connected using a short extension cable.
When direct it shows.
Screenshot_2024-08-30-05-25-49-252_com.gap.iidcontrol | Flickr (https://flic.kr/p/2qcTJoR)

[PerthDisco]

It’s designed to severely mess with your brain those coincidences.

[BradC]

Ok
Well it was a coincidence!
AC was only about 50% charge and that stopped it working.
The IIDTool didn't show the HVAC readings because it was connected using a short extension cable.

The HVAC is on the medium speed CAN bus. Perhaps your cable isn't a complete passthrough.