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Old 5th October 2021, 10:38   #1
suzublu
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Exclamation A/C Clutch

Right, further investigation the noise (after it stopped raining) I discovered that the a/c clutch isn't engaging Pointers to look for please, ie fuse? Thanks
Just to add, the clutch spins freely by hand

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Old 5th October 2021, 17:41   #2
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And to further add, tried the self diagnostics on the aircon panel, would't work, also the hrw doesn't seem to work either Are these connected If it stops raining, I'm going to put the P-scan on it, see what happens.
The demist operates the fan, but only when the engine's running, I thought it would come on with just the ignition?
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Old 5th October 2021, 18:20   #3
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Originally Posted by suzublu View Post
Right, further investigation the noise (after it stopped raining) I discovered that the a/c clutch isn't engaging Pointers to look for please, ie fuse? Thanks
Just to add, the clutch spins freely by hand
The trinary switch I believe inhibits the Compressor clutch if the system has a low refrigerant pressure/ volume. Are you certain of refrigerant volume ?
Have you tried by passing the switch to see if the Compressor clutch works ?
Possibly you could have a faulty trinary switch or poor connection with the switch wiring

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Old 5th October 2021, 18:34   #4
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Originally Posted by TourerSteve View Post
The trinary switch I believe inhibits the Compressor clutch if the system has a low refrigerant pressure/ volume. Are you certain of refrigerant volume ?
Have you tried by passing the switch to see if the Compressor clutch works ?
Possibly you could have a faulty trinary switch or poor connection with the switch wiring
Thanks Steve, It's been raining all day here, so haven't been able to test the trinary It's next on my list
It was supposedly regassed by Halfords but we'll see
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Old 5th October 2021, 18:51   #5
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The demist operates the fan, but only when the engine's running, I thought it would come on with just the ignition?
Nah, when I had the 1.8T the engine had to be running Ronnie.
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Old 5th October 2021, 18:54   #6
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Nah, when I had the 1.8T the engine had to be running Ronnie.
Cheers mate
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Old 5th October 2021, 21:35   #7
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Default Demist test -petrol & diesel engines.

All petrol engine models need the engine to be running to do the demist test, only the diesel works with the ignition at II engine not running.

Also check the single red wiring plug going into the compressor

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Old 6th October 2021, 07:38   #8
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Quote:
Originally Posted by suzublu View Post
It was supposedly regassed by Halfords but we'll see
Over pressure will inhibit the compressor as well but usually that is down to refrigerant cooling issues and the compressor will cycle in and out .
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Old 6th October 2021, 07:40   #9
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All petrol engine models need the engine to be running to do the demist test, only the diesel works with the ignition at II engine not running.

Also check the single red wiring plug going into the compressor

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Old 6th October 2021, 09:22   #10
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Done the trinary test, fan comes on when the 2 pins are shorted, no compressor though on the other 2 So clutch still not engaging. Would it be prudent to just change the clutch?
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