The answer to 'how to maintain boiler' is to perform regular maintenance and cleaning to keep your boiler running efficiently and safely. This includes tasks like checking the pressure, cleaning the burners, and inspecting the flue and venting system. It's important to follow the manufacturer's recommended maintenance schedule and safety precautions.
Proper boiler maintenance can help extend its lifespan, improve energy efficiency, and prevent costly breakdowns. Some tasks, like servicing the burners or addressing major issues, may require the help of a professional HVAC technician.