Member Since: 18 Jan 2023
Location: Thurrock
Posts: 139
Air con diagnostics
Looking at the below is there anything obvious that would say my AC isn't working? The pressure looks like it might be fairly normal, the compressor current changes when you switch in and out of eco, the optimist in me is hoping there's a simple fix!
Last edited by AdamB on 21st Jun 2023 9:00 pm. Edited 1 time in total
17th Jun 2023 9:58 am
Nc1989
Member Since: 28 Apr 2015
Location: Doncaster
Posts: 213
Check the compressor hasn’t seized and spat the front of the pulley off. Not the nicest of jobs to change it if it is knackered!
17th Jun 2023 11:39 am
Jimbob42
Member Since: 23 Mar 2022
Location: Leicester
Posts: 185
Pressure too low? If this is low side I’d expect 2500?
17th Jun 2023 5:34 pm
Nc1989
Member Since: 28 Apr 2015
Location: Doncaster
Posts: 213
Pressure looks in the ballpark, if you’d got 2500kpa I’d be concerned
17th Jun 2023 8:45 pm
Jimbob42
Member Since: 23 Mar 2022
Location: Leicester
Posts: 185
Meant 250 on low. High roughly 1200.
17th Jun 2023 9:14 pm
AdamB
Member Since: 18 Jan 2023
Location: Thurrock
Posts: 139
I'd only just turned it off at that point so there's a good chance it would have dropped further, will try again tomorrow.
How easy is it to diagnose the pulley?
17th Jun 2023 9:46 pm
AdamB
Member Since: 18 Jan 2023
Location: Thurrock
Posts: 139
Further to this I put a thermometer in the vent this morning, the air gets about a degree warmer when the AC is switched on. Would this indicate anything interesting? Tempted to grab one of those Halfords top up kits to see what happens.
21st Jun 2023 8:12 am
AdamB
Member Since: 18 Jan 2023
Location: Thurrock
Posts: 139
Just for info in case anyone finds this later, I bought the Halfords kit, regassed it and all currently appears to be good.
I came to the conclusion it needed a regas as the values reported by gap iid when off and on seemed fairly consistent with what I'd researched. Using an instant read thermometer (not the meat one from the kitchen if the wife asks, honest) I could repeatedly replicate the air temperature increasing by around one degree when the ac was on, dropping back to where it was before when ECON was pressed. I made the assumption that it was doing something so presumably it just needed a top up.
I bought the analogue guage version of the trigger and a bottle of the gas.
Before starting it read 100psi on the low side, as soon as I started the car it dropped to around 10psi. I've now charged it to around 30psi.
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