The fan of Dongfeng 370 car keeps spinning after the heater water tank is connected! The thermostat cannot be opened

The reason why the thermostat cannot be opened after the fan is turned on for a long time in Dongfeng 370 vehicles after the heater water tank is connected:

1. Failure of the heater water tank: The heater water tank may be faulty , resulting in the inability to introduce warm air water into the thermostat, making the thermostat unable to work properly.

2. The fan rotates for a long time: The fan may not stop rotating for a long time, which may be caused by a fault and needs to be inspected and repaired.