Is Wuling Hong Guang heater connected with thermostat?

Wuling Hong Guang warm air water tank is connected with the thermostat. There is nothing wrong with the thermostat. Connect the air inlet pipe and air outlet pipe of the heater tank directly with iron pipe to see if it is normal. All the necessary changes have been made, and the thermostat must be vented after installation. The exhaust hole is upward, and the copper temperature sensing element is installed in the direction of the engine. After the installation is completed, start the oil filler door, and turn it from 1500 to 2000, and check whether there is thin tube circulating water in the water replenishing kettle to let the engine out.