Warmworld FFC 30/60 Fault codes & diagnostics

3 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Regular Natural Gas 30 kW 2000 onwards Discontinued
GC Number 41-555-15
Download the Warmworld FFC 30/60 manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

This boiler uses LED flash patterns

Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →

Versions & GC numbers

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
41-555-15 FFC 30/60 2000–present
Just want the most common Warmworld FFC 30/60 faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 3 documented codes

Tap any card for details

Blocked condensate pipework

Your boiler has switched itself off because the waste water pipe that carries away condensation is blocked or frozen, causing water to back up inside the unit.

High DIY-safe £80-160

What to check first

  1. Locate the plastic pipe leading from the boiler to an outside drain.
  2. Check for any visible ice if the weather is freezing and gently thaw the pipe using a hot water bottle or warm (not boiling) water.
  3. Inspect the internal syphon trap under the boiler for any debris and carefully clear it if accessible.
  4. Reset the boiler once the blockage has been cleared.

Parts commonly replaced

  • Condensate Syphon Trap
  • External Condensate Pipework
  • Trace Heating Cable (optional preventative)

Related codes

Full explanation for Blocked condensate pipework
Lockout lamp

Your boiler has switched itself off because it has become too hot or there isn't enough water moving through the system.

High DIY-safe £120-280

What to check first

  1. Check that your system water pressure is between 1 and 1.5 bar
  2. Ensure all radiator valves and the boiler isolation valves are fully open
  3. Wait for the unit to cool down and try pressing the reset button

Parts commonly replaced

  • Flue thermostat
  • Overheat limit thermostat
  • Circulation pump

Related codes

Full explanation for Lockout lamp
Status & diagnostic codes

10 operating states & engineer diagnostics

Not faults — these are normal operating states. Tap to expand.

Running lamp flashing Status Your boiler is simply taking a short, programmed break before starting its next cycle to protect its internal components. 10 Diagnostic Your boiler has detected an issue with the heat output control, meaning it has temporarily shut down to prevent overheating or inefficient operation. 12 Diagnostic Your boiler has detected an issue with the heat output control system and has shut down to prevent potential damage. 14 Diagnostic Your boiler has detected an issue with the heat output control, meaning it has safely shut down to prevent damage or overheating. 16 Diagnostic Your boiler has detected a problem with the internal heat output settings which is preventing it from firing up correctly. 18 Diagnostic Your boiler has detected an issue with the internal heat output setting or the flow sensor, causing it to shut down to prevent potential damage. 20 Diagnostic Your boiler has detected an issue with its internal heating power settings, which is preventing it from firing up correctly. 22 Diagnostic Your boiler has detected an issue with its heating output or internal temperature sensing, which has caused it to stop working to protect itself. 24 Diagnostic Your boiler is signalling that it is unable to output the required heating power, likely due to a sensor miscommunication or a fault within the burner control system. 26 Diagnostic Your boiler has detected an internal configuration error where it is unable to correctly identify its own heat output settings, causing the system to stop working.