TSB : Cold Engine Lock-Out Switch
Heating, Ventilation & A/C (HVAC)
Details
Switch is located in coolant passage on engine block. It prevents blower operation when heating mode is selected and coolant temperature is less than 95°F (35°C). Fig 1: Locating Heater Control Valve Courtesy of MERCEDES-BENZ OF NORTH AMERICA Fig 2: Locating Auxiliary Coolant Pump Courtesy of MERCEDES-BENZ OF NORTH AMERICA
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