What's the matter with the truck heater not being very hot?

The cooling system of Pacific Automotive Network's engine is subject to air blockage, causing the car's cooling circulation system to not operate normally, resulting in the warm air not being hot, or the vehicle's water pump impeller being damaged or not rotating, causing the water tank to flow through The amount of water is reduced, resulting in warm air that is not hot.

Judging whether the heater air is not hot:

First, check whether the engine water temperature is normal. If it is always at low temperature and has not reached the operating temperature, the heater is definitely not hot. . At this time, you can focus on whether the thermostat is always in a large cycle state, or whether the water temperature sensor signal is true, etc., and repair or replace the faulty original.

The second point is to check whether there is a large temperature difference between the inlet and outlet pipes in front of the heater water tank. If this happens, the heater water tank must be blocked and needs to be disassembled, cleaned or replaced. .

The third point is to see whether the flow and temperature of the coolant entering the warm air water tank meet the requirements. The temperature can be measured by an infrared thermometer to measure the temperature difference of the pipeline, and the flow condition can be diagnosed by the detector. Data and fault storage, comprehensive judgment. Common ones are damage to the water pump due to lost rotation, damage to the heater flow valve and coolant circulation valve.

The fourth point is to see if there is air blockage in the coolant system. A common cause is that the coolant is not vented after replacing it. The relatively special cylinder gasket is damaged. Standard coolant bleeding methods can be used for further confirmation. (Pictures/Text/Photography: Cao Bo of Pacific Automotive Network)