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2008mar,s550 when you turn from air to heat does not come on…

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2008mar,s550 when you turn from...
2008mar,s550 when you turn from air to heat does not come on but temperature hand works,no change over sound
Submitted: 7 months ago.Category: Mercedes
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Answered in 6 minutes by:
12/11/2017
Mercedes Mechanic: Marty, Mercedes Technician replied 7 months ago
Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 55,218
Experience: Bosch Certified Master Tech. Over 35 years experience.
Verified

Hi, my name is***** sounds like you may have a fault with the heat exchanger shut off motor. It's a common cause of no heat on the S class. When the motor fails you will have no heat in the car. You should get the car connected to a Mercedes factory level scan tool to check for fault codes in the climate control system. The codes will point to the problem. The shut off motor is part number 230 830 00 84 and it retails for $60.

Let me know if you have any questions.

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Customer reply replied 7 months ago
Where's the shut-off motor located
Mercedes Mechanic: Marty, Mercedes Technician replied 7 months ago

Hi, just checking in. Do you need any more help with this?

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