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Frozen AC pipes & heater matrix

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01 Dec 2018 20:22 #198501 by Leighlo
With the AC switched off, the compressor appears to be running as the AC pipes are freezing up and massive lumps of ice are forming on them.

The passenger footwell is also freezing up! See pic of the heater area under the dash

Any ideas?
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01 Dec 2018 21:28 #198506 by Jezz
The clutch on the end of th ac compressor is probaly siezed in the on or engaged position. If you want to keep the ac you will have to look at it, or get someone too. If your not bothered about having ac, Just cut the drive belt off and forget about it.

It's been fettled just a tad.

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02 Dec 2018 07:47 #198513 by Riccy
Jezz is right, the magnetic clutch will be stuck on.

I have 2 jimnys, the grey one has bearing failure in the compressor pulley so is bypassed, the red one is like yours and stuck on. yet to have a go at that.

You could try a few swift bats with a hammer and bit of wood, which might free it off, otherwise you have these options:

1. accept that its always on (but press the button on the dash in to stop the dash icing up)

2. fit a 4pk850 belt which is shorter and will bypass the AC compressor altogether (resulting in no AC, but keeping the power steering).

3. Pay through the nose for a new compressor and regas (over £700 i think), used compressors are likley in similar condition unless much newer.

There is a 4th option im working on which is to remove the clutch and clean it up. The clutch plates are removed by undoing an allen bolt on the pulley, prise off and see what it looks like. as its at the bottom of the engine it gets all the dirt unfortunately. Note I havent tried this yet.

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02 Dec 2018 15:05 #198534 by Leighlo
I shall try the hammer method and let you know !

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03 Dec 2018 06:02 #198561 by Bosanek
Isn't it possible to replace the AC compressor clutch with an aftermarket one? Is an aftermarket replacement available?
Even if not, is it possible to take the AC compressor to a specialist workshop to have them disassemble it and repair the clutch?

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03 Dec 2018 07:31 #198562 by Lambert
I'm sure such companies are out there and it would certainly be a proper repair, but I'm in the bypass and bin it completely at the first sign of catastrophic failure camp. Less complicated and more reliable.

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03 Dec 2018 10:45 #198567 by paradox1001
Why not bypass the ac with a shorter belt for the time being.
Then remove the compressor and strip it down clean it up etc on a table at your leisure?

My guess is that because they are low down they get a lot of moisture/dirt ingress.

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