The answer to 'how to clean furnace' is to regularly clean and maintain your furnace to keep it running efficiently and safely. This includes cleaning or replacing the air filter, vacuuming out debris, and inspecting key components. Proper furnace maintenance can extend its lifespan and help prevent costly breakdowns.
Start by turning off power to the furnace and removing the access panels. Use a vacuum with a hose attachment to gently remove dust and debris from the blower, burners, and other interior components. Check the air filter and replace it if it's dirty or clogged. Wipe down the exterior of the furnace with a damp cloth. Lastly, inspect the furnace for any signs of wear or damage and address any issues before turning it back on.