The first maintenance requirement of house elevator is to choose a professional maintenance company.
After the free maintenance period, it's necessary to hire a maintenance company in order to guarantee the safe operation of the house elevator. But to reduce the cost, some of the maintenance company will use the poor quality product accessories or hire non professional personnel to maintain the elevator.
In fact, the maintenance personnel of a house elevator should know its structure and operation principle very well, and he also should adopt qualified professional accessories to keep the elevator's safe and smooth running.
Therefore the first maintenance requirement of house elevator is to choose a professional maintenance company.