W204 climate control

[mffa]

Hi
In last mounth i get 3 Mercedes w204 climate control dead.
Anyone can help to repair this units?
Thanks

[PSAcars]

Hello to all. What do you mean dead? No power, no display, no control, no diag or.....? Open one, make real good photos of pcb front and back, post here and lets go.

[mffa]

No leds and the car fan run at maximum speed

[mffa]

Here are the Fotos

[PSAcars]

Hello to all. Start by cheking main voltage on mcu after that 5v for suport ic's.

[mffa]

Yes i have i ressolder all and now i have ligths in bench mode +12 and GND but in car not work.
I think the problem is the nxp ct9471 (i think its a Can chip) but i not found any information and spare chip to buy and test

[PSAcars]

Hello to all. Please make good picture of this ic.

[PSAcars]

Hello to all. If we are talking of chip under big capacitor I think it is TLE9471ES.

[centrohifi]

hello, I also have a car with a climate problem in the workshop !!

don't turn it on !! In diagnosis does not respond! controlled with wiring diagram all ok, 12v GND and CAN 60ohm !!
I saw on eBay that it will be repaired with 30Euro !!
you have information

[PSAcars]

Hello to all. No I dont have any info, we here started repair in forum but mffa stopped writing. If you want we can help , but you will have to be activ.

[centrohifi]

Hi , this is the problem and the component to be replaced.

https://www.ebay.com/itm/1pcs-UJA106...-/123246454237


this is my contribution.
I ordered, but it takes a long time, for delivery (Corona Virus permitting)

[centrohifi]

I have solution for climate problem!

I have solution for climate problem! tested on A2049005805

to work

[PSAcars]

Hello to all. And the solution is ........ ?

[Meat-Head]

Other idea, spray entire board with uv ink, and light clear coat, send away, open up use uv light see what changed

[centrohifi]

Other idea, spray entire board with uv ink, and light clear coat, send away, open up use uv light see what changed

Another idea, put a fan, cockpit