The professional heating engineer’s complete “Boiler Fault Finder” for boiler and central heating fault finding.
“Boiler Fault Finder” results from years of experience as a professional service and repair engineer, demonstrating technical expertise within the industry.
The aim of its design is simple; to aid other competent gas operatives within the field, accurately and safely, allowing you to build a base on which to develop your own skills, at your own pace.
This technical, yet easy to follow “Boiler Fault Finder” is an invaluable key component within your everyday tool kit.”
Domestic Hot Water Faults
When the hot water is ok but the central heating is not, this eliminates all operating sequence possible faults such as the fan, air pressure switch, pump, ignition sequence, ignition detection, gas valve and domestic hot water thermistor.
Therefore,...
Boiler Shuts Down
Boiler shuts down and goes to lockout
Fault
Fix
faulty pump (not at full capacity)
replace pump head
faulty fan (not at full capacity)
check / lubricate bearings
clear debris build up
replace fan assembly
blocked...
Fan Problems
Fan running but no ignition at electrodes
Fault
Fix
air pressure switch hoses loose
check ports and firmly fix
split / kinked hoses
remove kink / replace hose
water in hoses (condensation)
dry hoses / replace...
Burner Not Igniting
Burner Not Igniting on your Boiler? Fault Finder for Heating Engineers and Plumbers
Noisy Hot Water Flow Switches
Noisy Hot Water Flow Switches? See our Fault Finder for Heating Engineers and Plumbers
Pressure Relief Valve Problems
Pressure Relief Valve Problems? Get the Fault Finder for Heating Engineers and Plumbers App
Explosive Ignition
Fault
Fix
pilot assembly not positioned correctly
reposition assembly
faulty gas valve (over gassing)
check burner pressures
faulty gas valve (sticking armature)
replace solenoid / gas valve
partially blocked...
Faulty printed circuit board (hot water side)
The PCB controls major elements of all boilers including: the fan, pump, gas valve, thermocouple, thermostat, overheat, etc.
Most problems are cumulative with PCB issues. There is a pre-defined sequence of operations for boiler operation which is critical...
Blocked Plate Exchanger
Blocked Plate Exchanger? Fix it with our Plumbers Fault Finder App for Heating Engineers