A-Class (W168, W169) A140, A160, A160 CDI, A170 CDI, A190, A210 Evo, A180

AC Problems

Old Jan 7, 2025 | 07:20 PM
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A150 W169 2005
AC Problems

Hello all,


So in the last 2 months my AC as stopped working completely, no cold-hot air neither blower.
The lights are working still.
When i turn the speed dial i can hear the flaps open.
Refrigerant liquid is at around 4 bar
Have heard around that AC can not be working due to low pressure on the refrigerant.
I tried to fill the refrigerant level with those cans you can buy online, but honestly i dont know if i did it correctly.

Connected an car diagnosis tool, it gave the fault error 9040 and when i enter the error it says:
4272 WP369 (sensor ponto de orvalho) (sorry for the error not being in english my tool is in portuguese and i couldnt find the exact translation) dont know if it is the air con sensor or the outside air sensor?

CAR: W169 A150 2005 Petrol


Would apreciate any possible help.

Thank you.
Best Regards,

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Old Jan 7, 2025 | 07:35 PM
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From: MBworld
bone stock E55 AMG
moved to W169 forum...
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Old Jan 15, 2025 | 05:47 PM
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A150 W169 2005
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