Is it illegal for the property to collect heating fees and refuse to pay them to the heating company?

Firstly, it is clear whether there is a supply-demand relationship between the two parties, that is, whether the two parties have signed a heating agreement or contract and implemented it according to the terms of the contract.

If the property company does not pay the heating fee of the heating company, the heating company can notify the other party in writing to pay, if the other party refuses to pay.

We can take corresponding measures to protect our interests from infringement.

Some property companies can go to the heating company to negotiate specific measures if the collection is incomplete or not.

As for the illegal laws and regulations, you can look at the local central heating management measures, and most places will have similar documents.