The answer to 'how to clean boiler' is to perform regular maintenance and cleaning of your boiler to ensure it operates efficiently and safely. This typically involves draining the boiler, flushing the system, and cleaning the internal components like the heat exchanger and burners. It's important to follow the manufacturer's instructions and safety guidelines closely when performing this maintenance.
Boiler cleaning should be done annually or as recommended by the manufacturer. Proper cleaning helps remove sediment and buildup that can reduce the boiler's efficiency and lifespan. If you're not comfortable performing the cleaning yourself, it's best to hire a professional HVAC technician to service the boiler.