Clicking sound from Duo Valve

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Macau_C180

New Member
Joined
Jun 26, 2007
Messages
21
Location
Macau
Car
1996 W202, C180
Hello, i would like to know if its normal to have some noise coming from the Duo Valve while the A/C is on.

In my car i cant get hot air blowing into the cabin, just very cold always.

I read so many problems about duo valves, but usually is the opposite, people only get hot instead of cold...

But yesterday i open the hood, and i can listen some noise from the duo valves, and when i touch it, i can also feel something tapping inside, is this normal? Or my problem can also be related to a defective duo valve?

thanks
 

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