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Stan
Stan, Mercedes Technician
Category: Mercedes
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Experience:  Technical support engineer
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The drivers side heater valve under the bonnet does not open

Resolved Question:

The drivers side heater valve under the bonnet does not open when alter the temperature dial from inside vehicle, so it dosnt circulate the hot water. What is the problem?
Submitted: 2 years ago.
Category: Mercedes
Expert:  Stan replied 2 years ago.
Stan :

Hello,
If everything is ok with the voltage supply to both valves, it is very common for the valves themselves to stick. They can be disassembled and cleaned.

Stan :

best regards,
Stan

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