The truck heater is not very hot. what's up

The engine cooling system of Pacific Auto Network is blocked by air, which leads to the abnormal operation of the automobile cooling circulation system, which leads to the lack of hot air, or the damage or non-rotation of the impeller of the automobile water pump, which leads to the decrease of water flow in the water tank and the lack of hot air.

Judging whether the warm air is not hot:

Let's first see if the engine water temperature is normal. If it has been in a low temperature state and does not reach the working temperature, the warm air will certainly not be hot. At this time, we can focus on whether the thermostat has been in a large cycle state, or whether the signal of the water temperature sensor is true, and repair or replace the faulty factory.

Second, we should focus on whether there is a large temperature difference between the inlet and outlet pipes in front of the warm air box. If this happens, the heater box must be blocked and needs to be disassembled, cleaned or replaced.

Thirdly, it depends on whether the flow rate and temperature of coolant entering the heater tank meet the requirements. The temperature can be measured by infrared thermometer, and the flow can be comprehensively judged by the diagnostic data and fault storage of the detector. The common causes are pump loss and damage, and the heater flow valve and coolant circulation valve are damaged.

Fourth, it depends on whether there is air resistance in the coolant system, which is usually not exhausted after replacing the coolant. The special cylinder gasket is damaged. Standard coolant discharge methods can be used for further confirmation. (Photo/Text/Photo: Pacific Auto Network Cao Bo)