Ferroli Combi 77 FF Popular Fault codes & diagnostics

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

Combi Natural Gas 23.3 kW 1994-2000 Discontinued
Download the Ferroli Combi 77 FF Popular manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

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Fault codes

All 1 documented codes

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5 red

Your boiler is currently taking a brief, scheduled pause to protect its internal parts before restarting your heating or hot water.

Low DIY-safe Community-sourced, unverified

What to check first

  1. Wait for 3 to 5 minutes to see if the boiler restarts automatically
  2. Ensure your room thermostat or programmer is calling for heat
  3. Check that your boiler pressure is between 1 and 1.5 bar
Full explanation for 5 red
Status & diagnostic codes

8 operating states & engineer diagnostics

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

38/33A Diagnostic Your boiler is failing to light the pilot flame correctly, meaning it cannot start the main heating process to provide you with hot water or warmth. 210 Diagnostic Your boiler has detected an issue with the internal configuration or settings related to how it burns gas, meaning it has shut down as a safety precaution to prevent improper operation. LED 2 on P.C.B. alight Status Your boiler is receiving electrical power, but if the display isn't working otherwise, there may be a blown fuse on the internal circuit board. LED1 Status Your boiler has detected that the internal air fan or pressure system is stuck in the 'on' position, preventing the boiler from starting its ignition sequence for safety. LED1 on Diagnostic Your boiler has detected a failure with the safety system that handles smoke and fumes, preventing it from firing up for your safety. LED2 Status Your boiler is currently receiving electrical power and is in a normal 'standby' mode waiting for a command to provide heating or hot water. LED3 Status Your boiler is currently reading a request to provide hot water or heating, which is a normal operational signal and not a fault unless the boiler fails to fire up. Relay 2 energised after 2 sec Diagnostic Your boiler has detected an internal electrical or sensor error that is preventing it from starting up safely.