Should the property company be responsible for the maintenance and replacement of residents' intercom doors?

According to what you said, the property management company should really repair or replace the external walkie-talkie. Because "the so-called property management refers to the activities that the owner selects a property service enterprise, and the owner and the property service enterprise repair, maintain and manage the house, supporting facilities, equipment and related sites according to the property service contract, and maintain the environmental sanitation and related order in the property management area", it can be seen that it is the responsibility of the property company to repair or replace the external walkie-talkie. You can find the theory of property service unit, or refuse to pay the property service fee on this ground.