Where is the warm air valve of Sany 365 excavator?

The warm air valve of Sany 365 excavator is located at the joint between the engine and the inlet pipe and outlet pipe of the warm air box. There is no need for heating in summer. Many car owners will close the valve and turn on the warm air. There is no warm air in the cab. If there is no warm air, you can check whether this warm water switch is turned on first, or you can feel whether there is hot air in the water pipe by hand. If you can't find this switch, you can look along the two warm water pipes under the cab.