Our service includes a comprehensive deep clean of the boiler as standard, returning it to “as new” condition.

Doors and lids (ropes and seals)
Refractory (fire bricks)YesSoft brush
Motors and gearingYesSet TensionLubricate with chain grease
Heat exchanger & turbulatorsYes, Full removalWire brushReplace if damaged
Ash boxes and extraction systemsYesEmpty/ VacuumCheck ash auger(s) for play & wear
IgniterCheck brush wear on Leister ignitersEnsure igniter tube is free of debrisEnsure igniter is correctly positionedAdjust preheat & prefill times if necessary
Light sensorYes, if equippedMake sure LDR is free of soot, clean with soft clothEnsure sensor is correctly positionedEnsure LDR values are within expected range in boiler software
Flue gas temp sensorYesClean by hand
Lambda probe (O² sensor)YesClean by handRun calibration software if sensor is not reading correct ambient oxygen.
Burn back flaps and water dousersYes, check condition of seals, thermal probes. Check flaps are operational.Activate douse test, ensure water is presentEnsure related proximity sensors/ light barriers are functioning
Fuel feed systemYesVacuum immediate (day) hopper if practical, inspect delivery and stoker augersReplace auger bearings if worn. Ensure auger flights are in good condition.
FansYes, run output test on all fans independently and observe for vibration and excess heat.Clean flue fan blades
System performance and combustionYes, inspect ash to determine if boiler is running clean, lean or rich.Adjust combustion parameters in software to achieve O² in flue stream of 9-11% at full power
Review data and error logsIf needed as part of diagnostics
Plumbing and fittings for leaksYes, inspect valves and joinsApply external leak sealer to minor leaks, replace badly leaking fittings
Pipe LaggingYesRemove dust from laggingReport to customer to replace missing sectionsSeal up exposed sections with aluminium tape after work
Expansion vessel(s) and automatic air ventsYes, inspect pressure on potable and system expansion tanksCheck air is present and at correct pressureReport on burst expansion vessels, replace leaking air vents
Buffer tank and temperature probesYes, inspect lagging, ensure probes are installed correctlyVerify temp. probes are reading accurately
Plant roomYes, ensure cleanliness and access to boilerRemove dust and debris from floor after serviceReport on presence of pests (vermin, insects)
Fuel storeYes, ensure fuel store is waterproof and pellet suction probes are operational (if fitted)Ensure wood chip delivery springs are operating correctly (if fitted)
Pellet vacuum delivery hosesYes, ensure hoses are securely connected to each port and there are no holes or tears in the hoseEnsure hose is in good condition. Replace sections that are damaged or that have a tight bend.
Pellet vacuum motorYes, inspect brushes for wear. Inspect cooling air flow to ensure motor is not overheating. Observe during operation to note fill time and commutator arcingRemove excess dust from sieve filter and around motor.Ensure pellet delivery hose is grounded on both ends.
VentilationYes, ensure adequate airflow is maintained so combustion gas can be exhausted and system equipment does not overheatClean and inspect air vents or fans (as fitted)