Ferroli Modena F Fault codes & diagnostics

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

Combi Natural Gas 24-32 kW 2006-2015 Discontinued
GC Number 47-267-24

Replaced by: Modena HE

Download the Ferroli Modena F 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 →

Severity at a glance

Each cell = one fault code. Hover to identify.
5 High 1 Low
Just want the most common Ferroli Modena F faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 6 documented codes

Tap any card for details

LED / flash-pattern codes
LED 5 (Flashing)

Your boiler has detected that the water pressure in your radiators or pipework is too low for it to run safely.

High DIY-safe £0-120

What to check first

  1. Locate the filling loop (usually a silver flexible hose) underneath the boiler.
  2. Gradually open the black handles (one or two) to allow water into the system.
  3. Watch the pressure gauge and close the handles once the needle reaches 1.5 bar.

Parts commonly replaced

  • Filling loop
  • Expansion vessel
  • Pressure sensor
Full explanation for LED 5 (Flashing)
LED4 flashing

Your boiler is currently taking a brief planned break between heating cycles to protect its components and ensure efficiency.

Low DIY-safe

What to check first

  1. Wait 3 to 5 minutes for the 'egg timer' delay to finish automatically
  2. Check that your room thermostat is set high enough to call for heat
  3. Ensure the boiler pressure gauge is between 1 and 1.5 bar

Related codes

Full explanation for LED4 flashing
LED5 flashing

Your boiler has switched itself off because the water pressure in your heating system has dropped too low to operate safely.

High DIY-safe £0-120

What to check first

  1. Locate the filling loop (usually a silver flexible hose) underneath or near the boiler.
  2. Open the filling loop valves slowly until you hear water flowing and watch the pressure gauge.
  3. Close both valves tightly once the pressure gauge reaches between 1 and 1.5 bar.

Parts commonly replaced

  • Filling loop
  • Expansion vessel re-pressurisation
  • Pressure sensor
Full explanation for LED5 flashing
Digital codes
E03

Your boiler has stopped working because it cannot safely confirm that the fan is moving air and exhaust gases correctly through the system.

High Engineer only £120-280

Parts commonly replaced

  • Air pressure switch
  • Fan assembly
  • Venting tubes
Full explanation for E03
LED 2

Your boiler has detected an internal fault and has shut down as a safety precaution, meaning you currently have no heating or hot water.

High Engineer only £120-350

Parts commonly replaced

  • Ignition Electrode
  • Gas Valve
  • Printed Circuit Board (PCB)

Related codes

Full explanation for LED 2
LED2 on

Your boiler has entered a safety lockout mode because it either failed to light properly or it has detected that the system is getting too hot.

High DIY-safe £100-280

What to check first

  1. Check that your gas supply is turned on and you have credit on your meter.
  2. Locate the selector switch and turn it to the 'R' (Reset) position for several seconds, then back to 'On'.
  3. Ensure your radiator valves are open and the system pressure is between 1 and 1.5 bar.

Parts commonly replaced

  • Ignition Electrode
  • Overheat Thermostat
  • Gas Valve

Related codes

Full explanation for LED2 on
Status & diagnostic codes

8 operating states & engineer diagnostics

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

LED 4 (Flashing) Status Your boiler is currently in standby mode for the central heating and is waiting for a signal from your thermostat to turn on. LED 1 Status Your boiler is currently switched on and operating correctly, as this light is a status indicator rather than a fault. LED 3 Status Your boiler is currently working to heat your tap water, which is a normal operating status rather than a fault. LED 4 (Permanent) Status Your boiler is currently operating normally and providing heat to your radiators. LED 5 (Permanent) Status Your boiler is receiving power and is currently in standby mode or operating normally, but it is not currently calling for heat or hot water. LED3 on Status Your boiler is currently working to provide hot water to your taps, which is a normal operating signal rather than a fault. LED4 permanent Status Your boiler is currently operating normally in central heating mode to warm your radiators. LED5 on Status Your boiler is receiving electrical power and is currently sitting in standby mode or operating normally.