Heater control valve on 1999 Dodge Ram 1500

Where is the heater control valve on a 1999 dodge ram 1500

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2 answers 1 comment
the door that opens and closes to adjust the heat/cool is located in the black box under the dash on the pass. side the entire dash has to be removed to access it
iS THIS WHERE THE ACTUATOR IS LOCATED ALSO? ARE THE DOORS CONTROLLED BY AIR HOSE, OR ELECTRIC WIRING?
Hardly any vehicles have heater valves anymore. Instead of controlling the heater output by shutting off the coolant into the heater core, this is now done by directing airflow through or around the heater core. The control system and flaps that direct the airflow need to be checked out if you don't have any heat.