Heater will not work?

Need (Temperature Blend Door motor)

Temperature blend door is controlled by an electric actuator (motor). Actuator is located on top of A/C evaporator housing. Temperature blend door actuator contains a reversible electric motor and a potentiometer

See if there is coolant going through the heater core. You can feel it if it is hot when the engine has been running. How is the temperature guage? Does it read normal when the car is warmed up? Check the thermastat and fluid levels.

This seems to be a major problem with these cars around your mileage and even less. Several things could be the cause, the blend door, the water pump impellar has worn down, the core has blockage, or the bypass tube is aiding in the loss of coolant flowing into the core due to blockage, major or minor, in the core. I know the bypass tube has created a lot of headaches. Make sure you remove the cowling and check the actual hoses going into the core, they may be cold due to blockage and the hoses you can see and think run directly to the core actually don't. The water is just circulating thru the bypass and back out again. A pal of mine had it on a 2000 Taurus, the core was major-league blocked, when he flushed it out, crap ran out for a good while, 20 mins or so. Maybe this'll help, maybe not, something to look at

I am glad you now have some heat. Check the fuses to see if there is a blown fuse for the heater control.

I need you to check two things. First make sure the coolant is full. Next, start the engine, let it get hot with the heater on high. Feel both heater core hoses at the firewall. THey should both be hot. Let me know what you find.

Joe