All Things Mk5 > How to Guides / Troubleshooting

Air Con Fans not kicking in from start

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ljc19630:
Hi Guys,
Been having some issues (which seem commonplace) with my A/C. Initially, the A/C wouldn't kick in for around 8-10 mins from starting the car from cold. I did some research and also checked VCDS. This said that there was an intermittent fault with the V113 Recirc Flap motor. Pulled out the glove box and checked the motor and yep, it was sticking, so have changed this and thats now sorted. I have also changed the Compressor Solinoid Valve to an RKX part, as reading lots of good reports on these. AC seems fine now, However, today I started the car up from cold, Turned on AC, opened the bonnet and the fans were not running. Left the car for at least 30 mins running and still not kicked in? C I have also purchased an A/C pressure switch which i'll fit tomorrow, albeit VCDS isn't advising any issues? can anyone assist me with what this issue could be, or how I can diagnose using VCDS?

Cheers
Louie

FJB:
AC wont run if the outside temperature is 3 degrees or below.

ljc19630:

--- Quote from: FJB on November 13, 2019, 04:04:51 pm ---AC wont run if the outside temperature is 3 degrees or below.

--- End quote ---

It was definitely higher than 3 degrees. This morning at around 10am was around 7 degrees - Could the Ambient Air Temp Sensor be faulty and if so would VCDS show this up?

FJB:
with a scan tool with engine running and ac on go to air conditioning / live data / group 001, this should give you a compressor status code, whether its on or off or too cold. If it says on with pressure ok it is likely to be the compressor or control valve. You wont get a fault code for broken compressor or valve, only for low pressure.

ljc19630:
Thanks buddy. I’ll have a play in the morning as off on leave all week


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