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Keston · Boilers and HVAC

Keston System S30 system boiler

Product information, applicable models, official documentation and 20 indexed error-code explanations for Keston System S30 system boiler.

Keston System S30 system boiler
20indexed codes
1named models or series
1official links
Product overview

About Keston System S30 system boiler

Keston System S30 system boiler is indexed in the Boilers and HVAC directory for United Kingdom and Ireland. This page brings the available product context, model references, documentation and diagnostic codes together in one place.

The codes below apply only where the linked code page lists this product or model. Confirm the complete model identifier because manufacturers may reuse the same characters across different ranges, generations and control systems.

An error code describes a condition detected by the product; it does not prove that a named component has failed. Follow the exact manual, avoid repeated resets and use an appropriately qualified technician whenever checks require internal access.

Applicability

Models and series

System S30
Complete directory

All Keston System S30 system boiler error codes

Showing 1–20 of 20

C0Keston · Keston System S30 system boiler · United Kingdom and IrelandC0 – Keston System S30 error codeKeston documents C0 for the original System S30 system boiler as “BCC activation fault”. Boiler-chip-card activation or configuration…C2Keston · Keston System S30 system boiler · United Kingdom and IrelandC2 – Keston System S30 error codeKeston documents C2 for the original System S30 system boiler as “BCC fault”. Boiler-chip-card fault. This is the…F0Keston · Keston System S30 system boiler · United Kingdom and IrelandF0 – Keston System S30 error codeKeston documents F0 for the original System S30 system boiler as “Unconfigured PCB”. The boiler control board is…F1Keston · Keston System S30 system boiler · United Kingdom and IrelandF1 – Keston System S30 error codeKeston documents F1 for the original System S30 system boiler as “Low water pressure”. The sealed heating-system pressure…F2Keston · Keston System S30 system boiler · United Kingdom and IrelandF2 – Keston System S30 error codeKeston documents F2 for the original System S30 system boiler as “Flame loss”. The burner flame was lost…F3Keston · Keston System S30 system boiler · United Kingdom and IrelandF3 – Keston System S30 error codeKeston documents F3 for the original System S30 system boiler as “Fan fault”. The combustion fan or its…F4Keston · Keston System S30 system boiler · United Kingdom and IrelandF4 – Keston System S30 error codeKeston documents F4 for the original System S30 system boiler as “Flow thermistor fault”. The boiler has detected…F5Keston · Keston System S30 system boiler · United Kingdom and IrelandF5 – Keston System S30 error codeKeston documents F5 for the original System S30 system boiler as “Return thermistor fault”. The boiler has detected…F6Keston · Keston System S30 system boiler · United Kingdom and IrelandF6 – Keston System S30 error codeKeston documents F6 for the original System S30 system boiler as “Outside sensor failure”. The optional outside-temperature sensor…F7Keston · Keston System S30 system boiler · United Kingdom and IrelandF7 – Keston System S30 error codeKeston documents F7 for the original System S30 system boiler as “Low mains voltage”. The incoming mains voltage…F9Keston · Keston System S30 system boiler · United Kingdom and IrelandF9 – Keston System S30 error codeKeston documents F9 for the original System S30 system boiler as “Unconfigured PCB”. The boiler control board is…FAKeston · Keston System S30 system boiler · United Kingdom and IrelandFA – Keston System S30 error codeKeston documents FA for the original System S30 system boiler as “Flow/return reversed”. The boiler has detected reversed…FUKeston · Keston System S30 system boiler · United Kingdom and IrelandFU – Keston System S30 error codeKeston documents FU for the original System S30 system boiler as “Flow/return differential above 50°C”. The temperature difference…L1Keston · Keston System S30 system boiler · United Kingdom and IrelandL1 – Keston System S30 error codeKeston documents L1 for the original System S30 system boiler as “Flow temperature overheat or no water flow”.…L2Keston · Keston System S30 system boiler · United Kingdom and IrelandL2 – Keston System S30 error codeKeston documents L2 for the original System S30 system boiler as “Ignition lockout”. The boiler failed to establish…L4Keston · Keston System S30 system boiler · United Kingdom and IrelandL4 – Keston System S30 error codeKeston documents L4 for the original System S30 system boiler as “Flow thermistor fault”. The boiler has detected…L5Keston · Keston System S30 system boiler · United Kingdom and IrelandL5 – Keston System S30 error codeKeston documents L5 for the original System S30 system boiler as “Return thermistor fault”. The boiler has detected…L6Keston · Keston System S30 system boiler · United Kingdom and IrelandL6 – Keston System S30 error codeKeston documents L6 for the original System S30 system boiler as “False flame lockout”. A flame signal was…L9Keston · Keston System S30 system boiler · United Kingdom and IrelandL9 – Keston System S30 error codeKeston documents L9 for the original System S30 system boiler as “Unconfigured PCB”. The boiler control board is…LCKeston · Keston System S30 system boiler · United Kingdom and IrelandLC – Keston System S30 error codeKeston documents LC for the original System S30 system boiler as “Five boiler restarts in 15 minutes”. The…