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I just finished a major upgrade (radio, instrument cluster, climatronic) to get rid of the old blue/red color scheme.


One of the things I replaced is the climatronic unit. I had the MY07 one, with the blue gauges.

I found one on eBay that was suitable (from a passat cc).

To do the upgrade you have to follow a couple of steps :

- In the largest of the 3 connectors , cut the pin20 and pin16 wires. Connect the wire that went to pin16 directly to pin20 on the connector. The other 2 wires can be taped off, they don't have to be reconnected. This is necessary because otherwise the climatronic unit won't remember its last setting and will be in the off-position anytime you start your car.

- The first time you use it, hold the AC button together with the upper-vent blower button for a couple of seconds. The LED's on the buttons will blink for a bit . When they stop blinking , hold the AC button together with the rear window heater button for a bit , the compressor will now calibrate.

- You also need a new fascia because the new climatronic has a different shape. Partnumber is 1Q0 858 069 J 041 in piano black. They also exist in silver but I liked PB more :p It took the VW dealership 3 days to get it , it costs 45 euro.
 

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Hello,

i want to do the same in My eos 2007 but what is the part number of climatronic ? it's Climatronic of New beetle or golf 7 ?

thank you
 

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Necroposting as I'm trying out an upgrade to mk6 Climatronic on MY07.

First off, OP broke the first rule of electronic mods: THOU SHALT NOT CUT THE FACTORY WIRING LOOM!

Some equipment levels (those with the remote auxiliary heater) already have the yellow and red wire on pin 20. Early versions of the Eos have a twin-motor recirculation flap which is not compatible with the mk6 Climatronic, so this upgrade does not work without more parts. If you try this on MY07 cars, you will likely discover that recirculation and possibly the compressor don't work. (some info here)

The right way to modify the wiring is to get a 2.8mm MCP connector, and an MQS plug and socket with connectors. That way, you can plug the old pin 16 into the MQS plug and make a wire that goes from that to the new MCP connector, plug that into pin 20 and tape off the old black and green wire - so you can undo the mod if it doesn't work.

The reason for this upgrade was that I wanted to add the air quality sensor - since I found the mk6 Climatronic panel and fascia cheaply I figured I'd give it a go. I've been through several iterations of this and I'm very glad I always had the ability to put everything back the way it was!
 

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OK, after a couple of brainwaves and getting a lot of things wrong, I believe I have everything working now - at least the recirculation seems to be working as it should - without any new parts - and recalibrated the compressor (it needs the engine to warm up before it will run).

The MY07 recirculation setup has two motors: one which controls a big quarter-circle flap that goes between fresh and recirculated air, and one which controls a small flap that lets cabin air in. Later versions have a single motor whose job it is to move the big flap, and the small flap probably moves using a sequence of gears.

According to the Germans you should wire the two motor signals together and do some magic with a potentiometer to make the two flaps work in harmony as the VW gods intended. There is something else you can do, though, which I found on another forum (post 147): you simply rotate the small flap so it's fully open, because the big flap does the job of switching between recirculation and fresh air. There may be slightly more cabin noise this way (I haven't tested this while driving yet) but it's easier than electrical hackery and won't go wrong. I'm probably going to order the other flap assembly anyway and stick it on my to-do list.

The easiest way to rotate the flap is to set the old Climatronic to recirculate then turn the ignition off. Then you can remove the glove box to check there's an open vent in front of you and unplug the blue connector that's right in front of you in the middle of the glove box. If for some reason the flap is closed, you can do it the hard way: now you've got the glove box out, undo the two nuts holding the comfort module in place and move it to one side, unclip a clip that was just behind that blue connector and one above the motor, and pull the plastic housing forwards. The motor will now pull out to the left. Use a screwdriver to press the clips on the motor through and open it up, then rotate the actuator by spinning the wheel on the end of the motor until it moves all the way to the opposite extent. Open the small flap, replace the motor and assemble everything the Haynes way (opposite of removal). Thanks to the two worm gears, the motor will keep that flap in place, and since it's unplugged, it won't do anything with the electrics. The nice thing about doing this is that, when you run the flap calibration, you can see into the mechanism and watch the big flap move exactly as it should. :)

As for the air quality sensor, here's how to fit that. I found it easier to use some stiff wire to push through from the engine bay to the cabin, loop it around the three wires I needed and pull them back through - regular wires didn't show up when I pushed them from the engine bay. And do not splice the wires - that's not cool! You can connect the earth to the grounding point by the front right wheel that becomes visible when you remove the glove box, and take the terminal 15 positive wire from pin 12 because the new Climatronic module doesn't need that - you'll need another MQS pin, but if you did what I said above you should have one to hand.

One last thing: the mk6 Climatronic figures out what kind of car it's in from the CAN gateway, and if the gateway doesn't declare the car to be a cabriolet, it won't change settings when you open and close the roof. So, if you've upgraded your CAN gateway, make sure you've not just updated the installation list, but also checked that the long coding is correct: it should be set to 355000 for the Eos.
 

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The newer version of the flap assembly has arrived and it's exactly as I thought: the newer version of the fresh air / recirculation flap opens both the big fresh/recirculation flap and the fresh air inlet flap via a clever gear.

Based on the removal of the new assembly from the rest of the climate system, swapping it out should be a matter of undoing two T15 screws then pushing the assembly forwards and lifting it up and out, unclipping the second motor as you lift it out. I'm hoping that removing it from the car won't require any fiddling around from the other side.
 

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Hah! So much for that. The assembly won't fit past other components in that area, and you'd have to take the dashboard out to do it. There doesn't appear to be any other way to do it, so this will have to wait for when I have a lot of time on my hands!
 
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