Does the water temperature of the car not go up have anything to do with the heater water tank?

After the engine is started, be sure to measure whether the engine temperature is the same as the water tank temperature. In general, when the engine temperature is not 80 degrees, the engine temperature rises slowly, the water pipe on the water tank is cold, and the thermostat will not be heated until the engine temperature reaches 80 degrees, indicating that the thermostat and water circulation system are good. If the water pipe temperature rises with the engine temperature, it means that the thermostat is broken, or improperly installed, with internal leakage. This is the most likely.

Some cars have a hot air tank. If you drive in a very cold place and keep the warm air on, the water temperature may not go up, which is relatively small.

After the engine starts for a period of time, measure the specific temperature of water at that time. If the water temperature is 80 degrees, there is something wrong with the water temperature sensor, instrument or circuit.