What Is It?
A gas appliance service checklist is a working document used by a Gas Safe registered engineer when servicing a domestic gas appliance. It lists each check and task in sequence — visual inspection, gas soundness, operating pressure, component cleaning, flue and ventilation checks, combustion analysis and safety device operation — with space to record readings and results. It is both a prompt that ensures a thorough service and a record that documents the condition of the appliance, the work carried out and the readings taken on the day.
About This Template
Servicing a domestic gas appliance — a boiler, fire, cooker or water heater — is a structured job, and a service checklist makes sure every step is carried out in the right order and nothing is missed. It guides the engineer through the gas tightness test, operating pressure and heat input checks, cleaning the burner and heat exchanger, flue and ventilation checks, the flue flow and spillage test, combustion analysis and the operation of the safety devices. Only a Gas Safe registered engineer may carry out gas work. A completed checklist provides a clear service record for the customer, supports the manufacturer's warranty and gives the engineer evidence that the appliance was left in a safe, correctly performing condition.
When to Use
- At the annual service of a domestic gas boiler, fire, cooker or water heater
- When servicing is required to keep a manufacturer's warranty valid on a newer appliance
- When a landlord wants an appliance serviced as well as safety-checked, often alongside the annual gas safety check
- After installing a new appliance, to record the commissioning checks and benchmark readings
- When investigating poor performance, such as a boiler losing efficiency or an appliance with combustion concerns
- When taking over the maintenance of an appliance and a baseline service record is needed
What to Include
- Property and customer details, appliance location, and the date of service and next service due date
- Appliance details: type, make, model, serial number, year of installation and gas type
- Engineer details: name, business and Gas Safe registration number, with the registration covering the appliance type
- Visual inspection: appliance condition, stability, signs of overheating, corrosion, soot or staining
- Gas tightness (soundness) test: confirmation a tightness test was carried out on the installation and the result was satisfactory
- Operating pressure and gas rate: burner operating pressure and/or gas rate checked against the manufacturer's data plate, with readings recorded
- Burner and heat exchanger: condition, and confirmation that the burner, heat exchanger and any condensate trap or injectors were cleaned as required
- Ventilation: confirmation that ventilation provision for the appliance is present, adequate and unobstructed
- Flue inspection: visual condition of the flue and terminal, correct routing and termination, and integrity of seals and joints
- Flue flow and spillage test: results of the flue flow test and the spillage test where the appliance type requires them
- Combustion analysis: combustion readings taken with a flue gas analyser, including the CO/CO2 ratio and CO and CO2 figures, checked against the manufacturer's acceptable range
- Safety devices: operation of the flame supervision device and any other safety controls, defects identified, parts replaced, confirmation the appliance is safe to use, and the engineer's signature and date
Tips
Always carry out a gas tightness test as part of the service and record the result — it confirms the installation is sound before and after the work
Check operating pressure and gas rate against the appliance data plate, not from memory; manufacturers specify different figures and the readings should always be written down
Carry out the flue flow and spillage test where the appliance type requires it — a flue that does not clear products of combustion safely is a serious finding regardless of how clean the appliance looks
Use a calibrated flue gas analyser for combustion analysis and compare the readings to the manufacturer's acceptable range; keep the analyser calibration certificate current
Record serial numbers and all readings on the checklist and leave a copy with the customer — a complete service history supports the warranty and helps the next engineer
