BoilerFaultCodes Alternating Software Sequence Error
Alternating Software Sequence Error
Glow-worm Micron 80 FF Fault codes & diagnostics
10 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Gas 2001-present
GC Number 41-047-51
Download the Glow-worm Micron 80 FF manual
PDF
Versions & GC numbers
The fault code is already on your display
Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →
Severity at a glance
Each cell = one fault code. Hover to identify. 10 Unrated
Which version do you have?
The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.
| GC number | Appliance (register name) | Produced |
|---|---|---|
| 41-047-51 | Micron 80 FF | 2001–present |
Appliance names and production years are taken from the UK Product Characteristics Database (the SAP/SEDBUK register). Where a GC number is also printed in this model's own manufacturer manual, both sources were checked to agree.
Just want the most common Glow-worm Micron 80 FF faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes
All 10 documented codes
Tap any card for details
Burner Lit
Burner Lit
Ignition Lockout
Ignition Lockout
Non-Volatile Lockout
Non-Volatile Lockout
Other Errors
Other Errors
PCB Failure
PCB Failure
Simultaneous Lighting Sequence - Fan/APS
Simultaneous Lighting Sequence - Fan/APS
Simultaneous Lighting Sequence - Thermistor
Simultaneous Lighting Sequence - Thermistor
Simultaneous Reversed Polarity
Simultaneous Reversed Polarity
Software Error
Software Error
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