Working principle of heater switch:
Heater switch is the switch for the heaters on a car.
The radiator in a heater is connected via inlet/outlet pipes to the engine water circulation system, and the water valve serves as a switch. When the valve is opened, the water circuit will be switched on, allowing the engine circulating water to enter the radiator. Heat is dissipated out of the driver’s cab by the fan. If the valve is closed, the heater will not work.
Heater switch maintenance tips:
- If it’s not cold, the heater water valve may be closed to achieve isolation between the engine cooling system and the heater switch.
- In cold winter days, before use of the heating system, check for any abnormal conditions of the left and right air supply pipes and water supply & drainage pipes such as loosening, fall-off, or breaking.
- Check if the heating system exhibits any unusual vibration and if the pipes show any sign of leakage. Check normal level of the drain tank and normal working condition of the drain pump.
- The water temperature of the engine should be preferably controlled below 90℃ in order to guarantee best performance of the heaters.
Name: heater switch
Borsehung No. : B18981
Ref No. : 4H0121671D
Applicable models:
Skoda: KOD 17-/KODR 18-/OCT 18-/SUP 15-
VW: ART 17-/BE 12-17/BEC 13-17/GOC 12-16/GOLF 13-17/PA 15-/PO 15-18/SCI 15-18/SHA 16-/TER 18-/TIG 16-;17-/TIGL 18-/TOU 16-/TOUA 18-/TROC 18-
Seat: AL 16-/AT 16-/IB 16-17/LE 13-17
Audi: A1 15-18/A3 13-17/A3CA 15-17/A4 13-16/A4AR 10-16/A4Q 13-16/A5CA 12-17/A5CO 12-17/A6 11-19/A6AR 13-18/A6Q 11-19/A7 11-19/A8 10-18/A8Q 10-18/AQ2 17-/AQ3 12-18/AQ5 09-17/AQ7 10-16/AQ8 19-/ATT 15-/RS6 13-18/RS7 14-18
