Gas supply problem, Gas line requires purging, Reversed polarity, Broken, internal flue joint
Vokera Linea Fault codes & diagnostics
9 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
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.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 |
|---|---|---|
| 47-094-40 | Linea 726 | 2003–2010 |
| 47-094-42 | Linea 730 | 2003–2010 |
| 47-094-44 | Linea 735 | 2003–2010 |
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.
All 9 documented codes
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Flow/return valves closed, Stuck pump
Debris in flue system, Debris in flue venturi
Insufficient water pressure, Air in boiler
Communication problem with optional remote control (RC05)
Problem exists with the secondary (DHW) thermistor
Problem exists with the primary thermistor
Burner thermostat has been activated
PCB fault