Audi A5 2012 black edition coupe diesel air con no longer cold

[Pappasmurf]

I've had the car since June 2016. I have covered 8000 miles and it's now at 40000 miles. Tonight I noticed the air was not very cold in the cabin. I selected 'lo' and basically toggling AC on/off makes no difference to the temp. Surely unlikely to have low refrigerant at 40k miles? It seemed to be ok yesterday

Thanks in advance

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[Darren92]

The car may have only covered 40k but its 5 years old. There is no set time or interval for aircon regas.

 

[Pappasmurf]

I appreciate that. What concerns me, after googling most of the afternoon, is if it is low, would it have lost the refrigerant without a leak? I've never had an issue with air con failing on any other car I've owned regardless of age. I know about the system having seals and that it should be run every week regardless of how cold the weather is. I leave my system on 'auto' all the time

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[Pappasmurf]

.......I noticed today that my 'stop/start' is also not working although the engine temp is up to normal temp. I'm guessing that this is can be due to cabin temp. Does anyone know more about this?

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[Pappasmurf]

Fwiw.......this turned out to be a faulty air con pressure sensor. Part number 236440071 Air con now cold and stop/start ok

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[Swanny356]

Had a similar problem on mine. I didn't notice it but VCDS said it was faulty.

Changed it and now shiver if I need too! The power of technology