HOUSING-BRAKE 1210667 - Caterpillar

Intake Air Temperature Sensor
Illustration 1 g03715893
(1) Intake air temperature sensor (recirculated air) Intake air temperature sensor (1) is located in the air inlet side of the air conditioning unit, just behind the recirculation filter. Intake air temperature sensor (1) converts the air temperature in the cab into a resistance. This resistance is converted into a voltage signal that is sent to the control module.Ambient Air Temperature Sensor
Illustration 2 g03715894
(1) Ambient air temperature sensor (fresh air) Ambient air temperature sensor (1) is located underneath the cab, on the right side. Ambient air temperature sensor (1) converts the ambient air temperature into a resistance. This resistance is converted into a voltage signal that is sent to the control module.Evaporator Sensor
Illustration 3 g03715932
Rear cover removed for clarity
(1) Evaporator sensor Evaporator sensor (1) is a semiconductor. When temperature increases, resistance decreases. On the other hand, when temperature decreases, resistance increases.Evaporator sensor (1) is located at the discharge side of the evaporator coil. Evaporator sensor (1) detects the temperature of the cooled air as the air is discharged from the evaporator coil. Evaporator sensor (1) then sends the signal back to the control module.In order to prevent the evaporator from freezing, the control module controls the outlet temperature by switching the air conditioner clutch ON or OFF.Water Temperature Sensor
Illustration 4 g03715928
(1) Water temperature sensor Water temperature sensor (1) is located in air conditioning unit, on the return tube of the heater core .Water temperature sensor (1) detects the temperature of the engine coolant that flows into the heater core. The sensor then sends the signal back to the control module.