Welcome:
I was wondering if both heater core hoses are getting hot. The bottom line is there could be electric, vacuum, or cable controls. I need to know the engine size, if it has manual climate control or if it is auto climate control.
If there is a vacuum actuator issue, you may hear a hissing or notice a slightly rough idle.
Here are the possibilities:
The climate control system heats or cools the vehicle interior depending on the function selector position and the temperature selected. Function selector position determines heating or cooling and air distribution. The temperature blend control setting determines air temperature. The list discusses the entire system and isn't limited to just the air temp door actuator.
The manual climate control components are used to:
- select air inlet source (outside or recirculated).
- select blower motor speed.
- select discharge air temperature (temperature blend).
- select discharge air location (defrost, panel, floor).
- select A/C compressor clutch operation.
Control system Inputs
The climate control assembly has three system controls:
- The A/C heater function selector switch combines a vacuum selector valve with two electrical switches to supply battery positive voltage (B+) to the A/C clutch circuit and the blower motor control circuit.
- 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 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 blower motor speed by adding or bypassing resistors in the heater blower motor switch resistor.
Let me know.
Joe
Wednesday, October 30th, 2019 AT 5:44 PM
