HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A–33
874RY00022
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Electronic Thermostat (With Manual A/C)
The thermostat consists of the thermo sensor and
thermostat unit which functions electrically to reduce the
noises being generated while the system is in operation.
The electronic thermo sensor is mounted at the
evaporator core outlet and senses the surface
temperature of the evaporator core. Temperature
signals are input to the thermostat unit. This information
is compared by the thermo unit and results in the output
to operate the A/C thermostat relay and turn the
magnetic clutch ON or OFF to prevent evaporator
freeze-up.
A characteristic of the sensor is that the resistance
decreases as the temperature increases and the
resistance increases as the temperature decreases.
874RX008
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Legend
(1) Evaporator Core
(2) Insulator
(3) Expansion Valve
Legend
(1) Duct Sensor
(2) Evaporator Core
(3) Thermostat Unit