What's included?
A visual check on flue ways and terminal
Cleaning the burner and pilot light
Cleaning and lubricating fan where applicable
Cleaning and adjusting the ignition components
Checking all disturbed gas connections
Checking all safety devices
Verifying gas pressure and heat input
Checking operating pressure and resetting if required
Checking seals (gas and water)
Testing open flued boilers for spillage
Checking expansion vessel and potentially recharging if needed