Coolant Temperature Sensor / Switch HVAC: Description and Operation
WATER TEMPERATURE SENSOR1. The water temperature sensor is located at the heater core, and detects coolant temperature flowing through heater core. It is an NTC device: resistance will rise with lower temperature, and drop with higher temperature.
Check:
2. Electromotive heating control
In AUTO mode, discharge mode to the FLOOR or Bi-LEVEL, if the coolant temperature is low, the sensor will the prevent cold air from being discharged toward passenger's legs.
1. Operation control
- Discharge mode FLOOR or Bi-LEVEL with AUTO setting
- Coolant temperature is low
2. System operation
- Mode door: DEF -> MIX -> AUTO
- Blower level: AUTO LOW -> AUTO HI
- Intake door: Ambient air
3. Override operation conditions
- After the ignition is on for 10 minutes.
- Coolant temperature is high.
- Upon selecting blower mode manual operation, it will release the selected mode only. Upon selecting auto mode, it will re-enter the selected mode.
- If the mode is released by the system it will not reset.
- It will prevail over max. hot feature.