Boiler maintenance service. Visual check, looking for any leaks or corrosion. Internal part check & clean-up. Flue terminal inspection. Pipework inspection. Gas pressure & flow setting review. Boiler operations & safety controls check-up. Test pilot operation and found faulty pilot safety switch, replaced. A boiler pilot safety switch shuts off the main burner of a boiler when the pilot flame goes out. This prevents unsafe conditions and the risk of fire or poisoning from natural gas. Boiler is now operating safely now.