First, the air conditioning filter element of the vehicle is blocked, which will reduce the air intake of the air conditioning system. Without enough air volume, the warm air can't be blown out, and it won't be very hot. Just replace the air conditioning filter.
Second, the airway is blocked, that is, there is a foreign body in the airway, which blocks the airway and will recover after dredging.
Third, the small warm air tank is blocked, which will make no hot water enter the small water tank and no heat source. Just clean the small water tank.
Fourth, the vehicle cooling water is missing, so the water will not enter the small water tank, so it will not be hot. Just add cooling water. The specific operation steps are as follows:
1. Open the door on the cab side.
2. Pull the hood switch on the left side of the driver's leg.
3. Lift the hood.
4. Support the engine hood with a support rod to ensure firm support and avoid danger.
5. Add cooling water to the water tank.
Precautions:
1. Add cooling water of the same specification.
2. Add cooling water of the same color. ?