1999 Mercury Sable LS 6 Cyl 3.0L
Heating is very poor.
Heater core flushed. Was clean. New heater hoses,water pump, thermostat. Air in car only gets luke warm. Temperature of hoses at heater core range between 175-185. Just bought car. Wonder if heater controls are malfunctioning.
The blend door actuator is a servo responsible for controlling the mix of warm air from the heater core and cool air from the A/C and outside. If it malfunctions, your climate control system may not respond properly when you change the temperature on the climate control system.