NO air flow in CABIN area rear climate control and back Already replaced front and rear blend doors???

SOURCE: Truck heater is stuck ON

There is a blend door motor on top of the housing. If you open the glove box, and look to the top of the housing near the left rear of the glove box, you should see the blend door motor. You can check it at this point. Also check the housing, as I have seen a number of these with a damaged or broken housing.

SOURCE: NO heat in front of 2001 windstar van. Thumping

Blend air door may be stuck. I removed a pencil from a heater box before. It had fallen from the dash, down through the defrost vents and jamed the door.

SOURCE: Blend door for front temp control is stuck in the

Control System Inputs
Climate Control Assembly
The climate control assembly has three control systems:

• The A/C heater function selector switch combines a vacuum selector valve for direct control of the vacuum control motors and electrical input to the instrument cluster module.
• The temperature selection is accomplished with a potentiometer connected to the electric blend door actuator that controls positioning of the temperature blend door. Movement of the control knob (18519) from COOL (blue) to WARM (red) causes a corresponding movement on the air temperature control door and determines the temperature that the system will maintain.
• The blower motor switch controls the blower motor speed through a series of resistors and a relay.

• The assembly is located on the passenger side of the plenum assembly behind the glove compartment (06010).
• Three resistance elements are mounted on the resistor board to provide four A/C blower motor speeds.
• Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
• An overheating protective device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F), interrupting the blower motor operation in all speeds except HI.
• The thermal limiter cannot be reset.

• Its function is to move the air temperature blend door on command from the control assembly.
• The A/C electric blend door actuator contains a reversible electric motor and a potentiometer. The potentiometer wiper is connected to the actuator output shaft and moves with the output shaft to indicate the position of the air temperature blend door.

SOURCE: My heat in my truck doesnt work

IT'S the actuator behind the radio ...thats where the clicking is coming from...tiny plastic gears are stripped .. the actuator opens and closes the flap to let in heat ...$50 part ...i did mine myself

SOURCE: 2002 Ford Crown Vic 4.6L. EATCM A/C, Heating

that clicking noise you hear is likely a relay in the fuse panel that needs to be replaced. the easiest way to find out which relay it is would be to put you finger on each relay as you actuate the device not working. once you locate the clicking relay replace it . to reset the computer just unhook the battery for about ten minutes. if you have an anti theft radio make sure you know the code for it and how to enter it before you unhook the battery.

robert