mercury Workshop Repair Guides

Mercury Workshop Service and Repair Manuals

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Heater Control Valve|Description and Operation|Page 7817 > < A/C - Moan/Buzz/Groan Noise From Vehicle Rear|Page 7813

Mountaineer 2WD V8-4.6L SOHC VIN W (2003)

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Heater Control Valve: Description and Operation

HEATER CONTROL VALVE

The heater control valve is actuated by the heater control valve vacuum switch (manual climate control) or the heater control valve vacuum control
circuit (DATC). when the heater control valve is closed (full vacuum), coolant flow through the heater core is shut off and A/C cooling efficiency is
increased.

Heater Control Valve|Description and Operation|Page 7817 > < A/C - Moan/Buzz/Groan Noise From Vehicle Rear|Page 7813