oil boiler repair 2

https://astro-wiki.win/index.php/Why_a_Trusted_HVAC_Technician_Matters_for_Your_Home_Comfort

When your oil boiler starts making weird clanking noises or won't fire up, it's usually a sign of sludge buildup in the tank or a faulty burner. A pro will first check the fuel line and filter, then clean the electrodes and nozzle. Ignoring it means no heat and a costly freeze-up risk.