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Where is the heater control valve on a 1998 ford expedition with 4.6L engine?

The heater control valve on a 1998 Ford Expedition with a 4.6L engine is located inside the passenger compartment, under the dashboard. It's not easily accessible and requires partial disassembly of the dash to reach. There isn't a single, easily visible external component like on some vehicles.

Because of its location, replacing it is generally a job best left to a mechanic. It's often integrated into the HVAC blend door assembly. You'll likely need to consult a repair manual specific to your vehicle year and engine to get precise location details and understand the disassembly process.

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