When the van is driving in winter, the water thermometer shows normal and the warm air is turned on. What happened to Didi? The thermostat has just been replaced.

When driving in winter, the water thermometer shows normal, and when the warm air is turned on, the water thermometer shows a drop.

Reason for failure:

The warm water pipe is blocked.

The warm water tank is blocked.

The thermostat is broken.

The water pump is damaged.

Troubleshooting:

1 Prepare tools (common tools,)

2. Start the engine. When the water temperature reaches normal temperature, feel whether the temperature of the upper and lower pipes is the same by hand. Otherwise, the thermostat is damaged and must be replaced.

3. Start the engine, turn on the warm air when the water temperature reaches normal temperature, and feel whether the warm water pipe has temperature by hand. If not, the warm water pipe is blocked, and then replace or clean the warm water pipe.

4. Start the engine. When the water temperature reaches normal temperature, turn on the warm air and feel the temperature of the heater by hand. If not, the hot water tank is blocked and then replaced or cleaned.

5. Start the engine. When the water temperature reaches normal temperature, feel with your hands whether the temperature of the water tank is the same as that of the engine. If not, replace the water pump.

If all the above faults are eliminated, the debugging faults will be eliminated.