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Author Subject: FAQ A/C Control Repair
gazzerdaman

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Location: Chelmsford

Registered: 25 Sep 2003

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Post #1
Please Don't Post on this thread !

The most common causes for blowing the air conditioning fuse is a blower motor overload or a short in the airconditioning control panel. It is best to eliminate the blower as the fault symply by unplugging it. If the fuse still blows it is best to disconnect the control panel next, this is the easiest way to determin whether the fault is in the A/C circuit board or not.
At this stage most people would now bite the bullet and order a new part. There is some good news. Most circuit boards can be saved with very little effort.

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Gary

Cherry Red GTi 6
Posted 10th Nov 2006 at 01:15
gazzerdaman

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Post #2
The A/C Control Panel

gazzerdaman has attached the following image:

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Gary

Cherry Red GTi 6
Posted 10th Nov 2006 at 01:22
gazzerdaman

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Location: Chelmsford

Registered: 25 Sep 2003

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Post #3
Repair Steps
1. Isolate the short circuit by disconnecting the A/C panel.
2. If this confirms the fault then procede with removing the control panel and dismantle.
3. Remove the large diode adjacent to the blue connector. See figure A and B.
4. Plug the A/C harness back into the crcuit board.
5. Does the fuse still blow? If not, then we are almost there.
6. Check all funktions and if all is ok, reassemble the panel.

Fig A

gazzerdaman has attached the following image:

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Gary

Cherry Red GTi 6
Posted 10th Nov 2006 at 01:23
gazzerdaman

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Post #4
Fig B

gazzerdaman has attached the following image:

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Gary

Cherry Red GTi 6
Posted 10th Nov 2006 at 01:23
gazzerdaman

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Location: Chelmsford

Registered: 25 Sep 2003

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Post #5
Important! It is not unusual for the earth and main power supply pins on the board or in the connector to be burnt due to the high current flow. This can be easely rectified by soldering an earth and positiv power supply wire directly in the place where the diode used to be. In figure B the locations are marked: + and respectivly.

gazzerdaman has attached the following image:

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Gary

Cherry Red GTi 6
Posted 10th Nov 2006 at 01:20
gazzerdaman

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Location: Chelmsford

Registered: 25 Sep 2003

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Post #6
Reason for Failure

The diode we removed is a Zener Diode and its function is to protect the sensitive logic circuits from voltage spikes by directing current to ground when the voltage exceeds the predetermined amount at the diode. A failed diode permanently lets current pass, which is our short. Although we won't have protection after the removal, at least the circuit board will have a new lease of life. There is quite a number of boards out there that are enjoying a long and happy life after the operation.

________________________________________

Gary

Cherry Red GTi 6
Posted 10th Nov 2006 at 01:22
gazzerdaman

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Location: Chelmsford

Registered: 25 Sep 2003

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Post #7
I expect it is probably possible to also replace the component but I haven't personally carried out this repair.

________________________________________

Gary

Cherry Red GTi 6
Posted 10th Nov 2006 at 01:21
gazzerdaman

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Post #8
Material obtained from Peugeot Logic Website

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Gary

Cherry Red GTi 6
Posted 10th Nov 2006 at 01:23
rudolf

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Location: Skelmersdale

Registered: 07 Apr 2004

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Post #9
It looks like the device is a surge suppressor which goes short circuit to protect the PCB.

If it is removed and it gets another surge the whole PCB may be destroyed.

Can you post the component number written on it and I will find out what it is exactly. I will then be able to get one for you.

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S Reg Diablo standardsSpec SORNED
R Reg Nile standard spec written off then repaired
X Reg Astor in need of TLC
R Reg Nile to restore
Set of Lions to fit.
Posted 10th Nov 2006 at 01:30
gazzerdaman

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Location: Chelmsford

Registered: 25 Sep 2003

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Post #10
No idea i've reposted this from another site . Tis a zener diode of some type - doubt it would be hard for anyone repairing to get the number off and order a replacement

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Gary

Cherry Red GTi 6
Posted 10th Nov 2006 at 01:32
jimmy_boy Forum Admin

Location: Christchurch

Registered: 09 Jun 2003

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Post #11
FAQ'ed Smile

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GTI-6 & Rallye

Rallye gets sideways in the wet at Snetterton Ninja
Posted 10th Nov 2006 at 02:15

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