The air conditioning pipe is blocked, it is not hot in winter and not cold in summer. Neighbors also use it normally. I wonder if it is the responsibility of the property?

Neighbors are normal, which proves that the main pipeline of the air conditioning system is smooth and the air conditioning system itself is fine.

It's just that there may be something wrong with the branch pipe from the supervisor to your home, or there may be something wrong with the end of your home.

In this case, first check the end filter, which needs to be cleaned several times before using the air conditioning system.

If the terminal is installed higher than the pipeline, it needs to be manually deflated, otherwise it will not work.

It is also possible that the branch pipe to your home is dirty or blocked. You can't do this and need professionals to deal with it.