The modern Rena anti-freezing pot is missing one every few days.

This antifreeze will be short after a while. In this case, a specific inspection is needed. There may be water leakage at the joint between the water pipe of this water tank and the water pump, and there may be water leakage in the warm air tank. These all need to be investigated. If no water leakage is found, it may be that the cylinder gasket of the engine is washed and the engine is boiling water, which will lead to insufficient antifreeze. These aspects need to be examined in detail.