1, the spark plug wire is burnt out, so the spark plug should be removed and replaced with a new one.
2. The firewood is poorly heated and ventilated, and it can't be fully burned under the condition of insufficient oxygen supply, or it can't be fully burned in a short time.
3. The firewood heater has too much carbon.
4. The impeller is damaged or lost, resulting in heating failure.
The reason why the firewood of the truck is warm or not;
1, the car's warm air uses a blower to blow the heat from the warm air small water tank into the cab. If the air volume is insufficient or the distribution of cold and hot air is not good, the heat of the small warm air tank will not be radiated, and the temperature of the warm air will not come up. At this time, first check whether the filter element is dirty and blocked, clean it, and replace it in time if necessary; Then check the operation of each gear of the blower, and each gear must reach sufficient speed. If the knob is set to the warm air position, the air volume is large enough and the wind direction is normal, and the cold air is blown out, check whether the cable of the hot and cold air control flap in the warm air box falls off, whether the warm air impeller is damaged, whether the flap falls off, etc. After troubleshooting, the warm air will get hot.
2. The thermostat is often opened or opened too early, which leads to the large circulation of the cooling system too early, and the outside temperature is very low. Especially when the car is driving, the cold air will soon cool the antifreeze, the engine water temperature will not come up, and the warm air will not be hot.
3. The water pump impeller is damaged or lost, so that the flow through the warm air small water tank is not enough, and the heat cannot come up.
4. There is air resistance in the engine cooling system, which leads to poor circulation of the cooling system, resulting in high water temperature and not hot warm air. If there is gas in the cooling system all the time, it is likely that the cylinder pad is damaged and the gas leaks into the cooling system; If the inlet pipe of the small heating tank is very hot and the outlet pipe is very cold, this situation should be that the small heating tank is blocked and should be replaced.