Recently I fixed some problems of the dual zone climate control unit in the GT. I made some photos, maybe it's interesting for someone.
My issues were:
- Characters on the LCD display mashed up when the humidity was high.
- "Clicks" disappeared from he rotating knobs. No response about the steps for the hand when turnining it.
- Uncomfortable heating, it blow hot air to my head, while my legs were freezing.
So, first the whole unit has to be removed from the car. You have to remove the radio unit, and the small tray under it, then it's only two screws away from the freedom.
The unit can be dismantled easily, You can help the plastic housing with a flat screwdriver to pop off.
To remove the internal electric panels, You will need a torx T10 key.
Here is a pic about the main parts
Maybe it's not too late to mention: You do it on Your own risk
Fixing the LCD display:
After testing the naked electric panel in the car, I found the root of the LCD problems:
There is a small plastic ribbon cable
, connecting the LCD display itself to the printed circuit.
In the factory, it's glued (!!!) to the panel with a special, electrically conductive glue.
The glue gets old, and humidity finds the way to short or break the circuit.
According the advice of an old friend, I made the following: Take a piece of paper, put it to the surface where the cable meets the board, then gently pulled over with a soldering iron
. The glue melted, the contact was restored.
Do not heat the plastic cable directly with an iron: it will melt in no time. The paper prevents it from overheating. Don't heat it more than 3 seconds...
I did the same heating process with the other end of the cable
, where it connects to the LCD.
Screwed the parts together, then placed a small polifoam piece
to push down the cable to the board. Just to make it sure...
Fixing the rattle of the turning knobs
When breaking the unit, You have to pull out the turning knobs
These are pipe shaped. Their inner end is "crowned" where the small tongues give the stepping and direction signal via an optical gate.
There is a rubbed, gear-like area near the inner end. A small, spring loaded plastic part is pushed against it, and this makes you feel the "clicks while turning".
Maybe it's foggy now, but this picture shows You the clear story
Check the plastic base panel. You will see, the slots holding the spring-unit are cracked or broken
Each knob have an own slot...
I simply glued the white headed springers to the slots with 2K epoxy. This should solve the issue for ever. One advice: avoid gluing the moving white parts!
Cleaning the internal air temperature sensor
You will find it in a small black tube-like piece
This contains a small electromotor and a ventillator head, which circulates the air to the sensor. This then measures the temperature, and based on it, the controller increases or decreases the temperature of the blown in air.
If it goes dirty, it measures wrongly
, and You will receive hot air to Your face.
The picture was taken after blowing out the majority of the powder...
The rest has to be cleaned with earpicks and alcohol