No A/C - Quick Fix
06-01-2013 | 10:13 PM
#46
Addict
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Joined: Oct 2002
Posts: 4,009
Likes: 22
From: Philly Area ----- George Washington took a dump in my backyard!
Decided to recharge it today, so the first thing I found was that the compressor didn't engage. The volt meter showed no voltage. I figured it was low on pressure. So I hot wired it and the compressor turned. I then charged it so that there was 45 psi on the gauge.
It was blowing cold so I shut down and unhooked the hot wire and plugged it back to the feed wire.
Well, it still doesn't engage, fuse in engine compartment is ok, the front fan runs, so now, I need to sort out why it's not powering up!
It was blowing cold so I shut down and unhooked the hot wire and plugged it back to the feed wire.
Well, it still doesn't engage, fuse in engine compartment is ok, the front fan runs, so now, I need to sort out why it's not powering up!
06-02-2013 | 12:57 AM
#47
Racer
Joined: Mar 2010
Posts: 362
Likes: 6
From: HK
Pressure switch give no signal to engage the compressor?
Decided to recharge it today, so the first thing I found was that the compressor didn't engage. The volt meter showed no voltage. I figured it was low on pressure. So I hot wired it and the compressor turned. I then charged it so that there was 45 psi on the gauge.
It was blowing cold so I shut down and unhooked the hot wire and plugged it back to the feed wire.
Well, it still doesn't engage, fuse in engine compartment is ok, the front fan runs, so now, I need to sort out why it's not powering up!
It was blowing cold so I shut down and unhooked the hot wire and plugged it back to the feed wire.
Well, it still doesn't engage, fuse in engine compartment is ok, the front fan runs, so now, I need to sort out why it's not powering up!
06-02-2013 | 03:57 PM
#51
Rennlist Member
Joined: Apr 2004
Posts: 2,457
Likes: 428
From: Oslo, Norway
The compressor activation signal (GND) is generated in the CCU, and shut off by the ("three level")pressure switch if the pressure or refrigerant level is too high or too low.
The +12V feed for the compressor relay is routed through the R01 Backup Light relay in the front fuse box.
See the my HVAC pages (select the Details page) how to find faults in this: www.porschehvac.bergvill.com
Cheers,
Tore
The +12V feed for the compressor relay is routed through the R01 Backup Light relay in the front fuse box.
See the my HVAC pages (select the Details page) how to find faults in this: www.porschehvac.bergvill.com
Cheers,
Tore
