What problem can occur if air binds the piping in a hot water heating system?

When air binds the piping in a hot water heating system, it can lead to stopped flow in the system. Air pockets can form at high points in the piping where water cannot easily circulate. These pockets disrupt the natural flow of water, as the system relies on consistent movement to heat spaces effectively. When air is trapped, it prevents the hot water from reaching radiators or other heat emitters, leading to inadequate heating in the space intended for warmth.

This blockage is particularly problematic because it not only hinders the system's ability to function properly but can also lead to increased pressure build-up in the pipes and potential system failures. Proper bleeding of the system is necessary to remove trapped air and restore full functionality to the heating system.