LR3/Disco 3
of the blower is controlled by the blower control module, which regulates the blower motor voltage in response to a Pulse
Width Modulated (PWM) signal from the ACCM. To vary the blower motor voltage the ACCM varies the duty cycle of the
PWM signal.
Evaporator Temperature Sensor
The evaporator temperature sensor is a Negative Temperature Coefficient (NTC) thermistor installed in the auxiliary
climate control assembly on the downstream side of the evaporator. The evaporator temperature sensor supplies a
temperature signal to the ACCM.
REFRIGERANT CIRCUIT
Two refrigerant lines, low pressure and high pressure, connect the evaporator in the auxiliary climate control assembly to
the front A/C refrigerant system. On the auxiliary climate control assembly, a solenoid valve and a thermostatic expansion
valve control the flow of refrigerant through the evaporator.
Refrigerant Lines
Item Part Number
Description
1
-
In-line connections
2
-
Auxiliary climate control assembly
