1. The water pressure is not enough. The air pump may be higher than the engine, causing water pressure to fail. Can be changed to a position below or level with the engine. You can also add a warm air circulation pump.
2. The thermostat is always open or the thermostat is opened too early, causing the cooling system to undergo a large cycle prematurely, while the outside temperature is very low, especially when the car is running, the cold wind quickly kills the antifreeze. With liquid cooling, the engine water temperature will not rise, and the heater air will not heat up. In this case, the thermostat can be turned off for a period of time.
3. The impeller of the water pump is damaged or lost, causing insufficient flow through the small warm air water tank and preventing heat from coming up. In this case, the water pump impeller can be replaced.
Extended information:
Notes on classic Transit warm air:
1. Increase humidity
When the warm air continues for a period of time , you will feel obviously dry mouth and uncomfortable breathing. This is because the air in the north is very dry in winter. Using warm air in a closed environment can exacerbate dryness. At this time, you can open the window appropriately to solve this problem.
2. Set a reasonable wind direction
When using warm air in winter, the wind direction should be adjusted to the position of the blower foot so that people will not feel suffocated obviously and can obtain a good heating effect. .
3. Set a reasonable temperature
Although the warm air in winter can drive away the cold, it also has some disadvantages. Due to the large temperature difference between the inside and outside of the car, the air is extremely dry, and car owners with weak body resistance can easily catch fire and catch cold. Therefore, you should drink plenty of water and try to maintain warm air.