Blower Motor Thermal Limiter

Blower Motor Thermal Limiter
The thermal limiter, used in the heater blower motor switch resistor, performs the following functions:
^ It serves as a temperature-protecting fuse.
^ It is located a predetermined distance away from the resistor coils and in series with the coil circuit.
^ It will open the resistor coil circuit when temperature of the thermal limiter reaches 121°C (250°F), interrupting blower motor operation in all speeds except HI.
^ The spring contacts separate when the wax softens, causing an open circuit in the heater blower motor switch resistor.