Working principle of warm air valve: Warm air water valve is the warm air switch of automobile heater. The working principle of the automobile heater is that the radiator in the heater is connected with the circulating water of the engine through the water inlet and outlet pipes, and the water valve is a switch: when the water valve is opened, the water channel is connected, the circulating water of the engine enters the radiator, and the fan blows heat into the cab; On the contrary, the water valve is closed and the warm air doesn't work.
Maintenance skills of warm air valve;
1. In cold season, the hot air inlet valve can be closed to isolate the engine cooling system from the hot air valve.
2. In cold winter, before using warm air, check whether the left and right air supply pipes and water inlet and outlet pipes are loose, falling off and broken.
3. Check whether the heating system vibrates abnormally, whether the pipeline leaks, whether the water level in the drainage tank is normal and whether the drainage pump works normally.
4. The water temperature of the engine should not exceed 90℃ to ensure the best performance of the heater.
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