Examine your boiler carefully. A boiler's vent connection and chimney will both deteriorate over time, so it's crucial to check that they are both in good working condition and have no leaks. Pay close attention to where the vent connects to the boiler unit. Simply visually inspecting each of these systems a few times a year will help you predict when issues will arise and when repairs are necessary.
Ensure the heat exchanger is in good working condition. Nine out of ten times, the heat exchanger is where a boiler leak is coming from. It's crucial to visually inspect it whenever you remember to. To check for any small leaks, look all around your system's heat exchanger. Additionally, keep an eye out for any small water spots near the exchanger before, during, or after use.
Clean the Boiler. Rust and other debris accumulate in your home's boiler system during routine use. This debris can, in some cases, clog the system and reduce its effectiveness over time. Because of this, it's crucial to flush it out frequently. Open the radiator and convector valves to let air into the system before flushing the boiler. Prepare buckets to catch any leaking water.