Boiler Fault Finder

Blocked plate exchanger

Waterways restricted with debris accumulation (rust/magnetite) Scale formation (hard water areas depositing calcium carbonates) Filter blocked (sometimes located on the primary inlet to protect the…
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Boiler Fault Error Codes

Boiler Faults and Error Codes

Boiler Fault Error codes listed with fault codes and how to solve. Heating Engineers.
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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…
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Burner Not Igniting

Fault Fix faulty thermocouple check connections / replace thermocouple faulty gas valve (sticking armature) replace solenoid / gas valve faulty ignition electrodes / leads inspect…
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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…
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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 /…
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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…
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Faulty printed circuit board (hot water side)

Where printed circuit boards do not exhibit any obvious burnt spots (dark staining), cracked joints, blown fuses or any other signs such as water damage,…
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General Boiler Fault Finding for Heating Engineers

General Fault finding

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…
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Noisy Fan

Fault Fix Worn bearings replace fan Jammed air rotor lubricate rotor Impeller heavy with foreign matter accumulation clean / service fan… This content is for…
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