When your Ferroli boiler develops a fault, a fault code will appear on your boiler’s control panel to inform you that a problem has occurred. In some cases, the boiler may enter a lockout mode when a fault is detected, meaning the boiler will shut down and refuse to work until the fault has been cleared. The Ferroli fault codes provide your engineer with important information and help them to diagnose issues so that they can get your boiler up and running again as quickly as possible.
If you’re currently experiencing a problem with your Ferroli boiler and a fault code has appeared, the tables below should help you find out the possible cause and solution.
Ferroli Econcept 51A System Boiler Fault Codes
FAULT CODE
POSSIBLE CAUSE / SOLUTION
A01
Failed burner assembly ignition – No gas supply, ignition or detection electrode fault, defective gas valve or faulty full auto control – Check the gas flow to the boiler is correct and that the air has been purged from the piping. Check the wiring to the electrode and that these are positioned correctly and free of deposits. Check and replace the gas valve if required.
A02
Safety thermostat activation – Outlet sensor not active or no system circulation – Check the correct positioning and operation of the outlet sensor and check the pump.
A03
Flue safety device intervention – Flue partially blocked or insufficient – Check the efficiency of the flue, the flue gas exhaust pipes and the outlet terminal.
A04
No flame following the ignition phase – Low gas pressure, faulty ionisation probe or faulty full auto probe – Check as necessary.
F05
Insufficient water system pressure – System empty – Fill the system to 1.5 bar.
F06
Fan fault – Fan not powered or defective fan – Check the wiring to the fan or replace the fan.
F07
High flue temperature 3 x F07 in 24 hours = A03 – Flue partially blocked or insufficient sized – Check the efficiency of the flue, the flue gas exhaust pipes and the outlet terminal.
F08
Excessive central heating outlet temperature – Pump blocked or faulty = Free the pump by removing the cap and rotating the shaft with a screwdriver or check or replace the condenser or the pump.
F09
Excessive central heating return temperature – No system circulation – Check the system and pump.
F10
Outlet sensor faulty – Sensor damaged or wiring is cut – Check wiring or replace the sensor.
F11
Return sensor faulty – Sensor damaged or wiring is cut – Check wiring or replace the sensor.
F12
Domestic hot water sensor faulty – Sensor damaged or wiring is cut – Check wiring or replace the sensor.
F13
Flue gas sensor faulty – Sensor damager or wiring is cut – Check wiring or replace the sensor.
F14
External probe faulty (if installed) – Sensor damaged or wiring is cut – Check wiring or replace the sensor.
A16
No communication between the main board and ignition devices – Wiring cut or incorrect between main board and ignition devices – Check wiring and the connections between the boards.
F17, F18 or F19
Microprocessor faulty – Disconnect and restore the electrical power supply. If the problem persists, check and/or replace the main board.
Ferroli i25 and i29 Combi Boiler Fault Codes
FAULT CODE
POSSIBLE CAUSE / SOLUTION
A01
No burner ignition – No gas supply, ignition/detection electrode fault, faulty gas valve, ignition power too low or excessive condensate level – Check the regular gas flow to the boiler and that the air has been eliminated from the pipes, check the wiring of the electrode and that it’s correctly positioned and free of debris, check the gas valve and replace it if necessary, adjust the ignition power or clean or empty the trap.
A02
Flame present signal with burner off – electrode or card fault – Check the ionisation electrode wiring and check the card.
A03
Overtemperature protection intervention – Heating sensor damaged, no water circulation in the system, air in the system or safety thermostat intervention – Check the correct positioning and operation of the heating sensor, check the circulating pump, vent the system and check safety thermostat operation.
F04
Card parameter fault – Wrong card parameter setting – Check the card parameter and modify it if necessary.
F05
Air pressure switch fails to close contacts within 20 seconds of fan activation or air pressure switch due to activation of the fume thermostat – Air pressure switch contact open, faulty air pressure switch wiring, wrong baffle or flue obstructed or not correctly sized – Check the pressure switch, fan and fan socket, check the wiring, make sure the baffle is correct and check the length or the flues or clean them.
A06
No flame after the ignition phase – Low pressure in the gas system or burner minimum pressure setting – Check the gas pressure.
F07
Air pressure switch contacts closed on activation of fan – Air pressure switch contact open, faulty air pressure switch wiring, wrong baffle or flue obstructed or not correctly sized – Check the pressure switch, fan and fan socket, check the wiring, make sure the baffle is correct and check the length of the flues or clean them.
A09
Gas valve fault – wiring disconnected or faulty gas valve – Check the wiring or check the gas valve and replace it if necessary.
F10
Delivery sensor fault – Sensor damaged, wiring has shorted or wiring has disconnected – Check the wiring or replace the sensor.
F11
Domestic hot water sensor fault – Senor damaged, wiring has shorted or wiring is disconnected – Check the wiring or replace the sensor.
A15
Air pressure switch fails to close contacts within 20 seconds of fan activation – Fault F05 generated 5 times in the last 24 hours – See fault F05.
A16
Gas valve fault – wiring is disconnected or faulty gas valve – Check the wiring or check the gas valve and replace it if necessary.
A23 or A24
Card parameter fault – Wrong card parameter setting – Check the card parameter and modify it if necessary.
F34
Supply voltage under 140VAC – Electric mains trouble – Check the electrical system.
F35
Faulty mains frequency – Electric mains trouble – Check the electrical system.
F37
Incorrect system water pressure – Pressure too low or water pressure switch damaged or not connected – Fill the system or check the sensor.
F43
Exchanger protection intervention – No system H2O circulation or air in the system – Check the circulating pump or vent the system.
F50 or F51
Controller DBM32B fault (internal error) – Check the earth connection and replace the controller if necessary.
Ferroli Modena HE Combi Boiler Fault Codes
FAULT CODE
POSSIBLE CAUSE / SOLUTION
A01
No burner ignition – No gas supply, ignition/detection electrode fault, faulty gas valve, incorrect gas pressure or siphon obstructed – Check the regular gas flow to the boiler and that the air has been eliminated from the pipes, check that the electrodes are correctly positioned and free of debris, check the gas valve and replace it if necessary, check inlet gas pressure or check the siphon and change if necessary.
A02
Flame detected with burner off – Ionisation electrode defective or main board defective – Check the ionising electrode wiring or check the PCB.
A03
High limit protection – Flow temperature sensor not active or correctly located or no system circulation – Check the correct positioning and operation of the flow sensor or check the pump and radiator valves present in the system and check operation of the internal by-pass.
A04
Flue gas fault – Fault F07 happened 3 times in the last 24 hours – Check the flue.
A05
Fan fault – Tachometer signal interrupted for 1 hour or longer – Check the wiring and the fan.
A06
No flame after the ignition phase (6 times in 4 minutes) – Detection electrode fault, flame unstable, incorrect valve gas offset, flue gas circuit obstructed or siphon obstructed – Check the electrodes are correctly positions and change of necessary, check the burner, check the offset at the minimum power, check if the flue gas circuit is free or check the siphon and change if necessary.
A41
Flow sensor disconnected – Check the correct positioning and operation of the flow sensor.
A42
Flow sensor fault – sensor damaged – Change the sensor.
F07
High fume temperature – The exchanger probe detects an excessive temperature for over 2 minutes – Check the exchanger.
F10
Flow sensor fault – Sensor damaged or short circuited or wiring broken – Check the wiring or change the sensor.
F11
Return sensor fault – Sensor damaged or short circuited or wiring broken – Check the wiring or change the sensor.
F12
Domestic hot water fault – Sensor damaged or wiring shorted or disconnected – Check the wiring or replace the sensor.
F13
Exchanger probe fault – Sensor damaged or wiring shorted or broken – Check the wiring or replace the probe.
F14
Flow sensor fault – Sensor damaged or short circuited or wiring broken – Check the wiring or replace the sensor.
F15
Fan fault – Tachometer signal interrupted, problem with fan connection, fan damaged or debris in fan – Check the wiring and the fan and clean any debris.
F34
Supply voltage under 170V – Electric supply problem – Check the electrical system.
F35
Irregular mains frequency – Electric supply problem – Check the electrical system.
F37
Incorrect system water pressure – Pressure too low or sensor damaged – Fill the system and check the sensor.
F39
External probe fault – Sensor damaged or short circuited – Check the wiring or change the sensor.
F43
Exchanger protection activation – No system circulation or air in the system – Check the circulating pump or vent the system.
F52
Flow sensor fault – Sensor damaged – Change the sensor.
A61
Controller 041049G0 fault (internal error) – Check the earth connection and replace the controller if necessary.
A62
No communication between the controller and gas valve – Controller not connected or valve damaged – Connect the controller to the gas valve or replace the gas valve.
A63, A64 or F66
Controller 041049G0 fault (internal error) – Check the earth connection and replace the controller if necessary.
Ferroli Modena HE System Boiler Fault Codes
FAULT CODE
POSSIBLE CAUSE / SOLUTION
A01
No burner ignition – No gas supply, ignition/detection electrode fault, faulty gas valve, incorrect gas pressure or siphon obstructed – Check the regular gas flow to the boiler and that the air has been eliminated from the pipes, check that the electrodes are correctly positioned and free of debris, check the gas valve and replace it if necessary, check inlet gas pressure or check the siphon and change if necessary.
A02
Flame detected with burner off – Ionisation electrode defective or main board defective – Check the ionising electrode wiring or check the PCB.
A03
High limit protection – Flow temperature sensor not active or correctly located or no system circulation – Check the correct positioning and operation of the flow sensor or check the pump and radiator valves present in the system and check operation of the internal by-pass.
A04
Flue gas fault – Fault F07 happened 3 times in the last 24 hours – Check the flue.
A05
Fan fault – Tachometer signal interrupted for 1 hour or longer – Check the wiring and the fan.
A06
No flame after the ignition phase (6 times in 4 minutes) – Detection electrode fault, flame unstable, incorrect valve gas offset, flue gas circuit obstructed or siphon obstructed – Check the electrodes are correctly positions and change if necessary, check the burner, check the offset at the minimum power, check if the flue gas circuit is free or check the siphon and change if necessary.
A41
Flow sensor disconnected – Check the correct positioning and operation of the flow sensor.
A42
Flow sensor fault – sensor damaged – Change the sensor.
F07
High fume temperature – The exchanger probe detects an excessive temperature for over 2 minutes – Check the exchanger.
F10
Flow sensor fault – Sensor damaged or short circuited or wiring broken – Check the wiring or change the sensor.
F11
Return sensor fault – Sensor damaged or short circuited or wiring broken – Check the wiring or change the sensor.
F13
Exchanger probe fault – Sensor damaged or wiring shorted or broken – Check the wiring or replace the probe.
F14
Flow sensor fault – Sensor damaged or short circuited or wiring broken – Check the wiring or replace the sensor.
F15
Fan fault – Tachometer signal interrupted, problem with fan connection, fan damaged or debris in fan – Check the wiring and the fan and clean any debris.
F34
Supply voltage under 170V – Electric supply problem – Check the electrical system.
F35
Irregular mains frequency – Electric supply problem – Check the electrical system.
F37
Incorrect system water pressure – Pressure too low or sensor damaged – Fill the system and check the sensor.
F39
External probe fault – Sensor damaged or short circuited – Check the wiring or change the sensor.
F43
Exchanger protection activation – No system circulation or air in the system – Check the circulating pump or vent the system.
F52
Flow sensor fault – Sensor damaged – Change the sensor.
A61
Controller ABM03 fault (internal error) – Check the earth connection and replace the controller if necessary.
A62
No communication between the controller and gas valve – Controller not connected or valve damaged – Connect the controller to the gas valve or replace the gas valve.
A63, A64 or F66
Controller ABM03 fault (internal error) – Check the earth connection and replace the controller if necessary.
Ferroli Energy Top Condensing Boiler Fault Codes
FAULT CODE
POSSIBLE CAUSE / SOLUTION
A01
No burner ignition – No gas supply, ignition/detection electrode fault, faulty gas valve, incorrect gas pressure or siphon obstructed – Check the regular gas flow to the boiler and that the air has been eliminated from the pipes, check that the electrodes are correctly positioned and free of debris, check the gas valve and replace it if necessary, check inlet gas pressure or check the siphon and change if necessary.
A02
Flame detected with burner off – Electrode defective or card fault – Check the ionising electrode wiring or check the card.
A03
Overtemperature protection activated – Heating sensor damaged, no water circulation in the system or air in the system – Check the correct positioning and operation of the heating sensor, check the circulating pump or vent the system.
A04
Fume extraction duct safety device activated – Fault F07 generated 3 times in the last 24 hours – See fault F07.
A05
Fan protection activated – Fault F15 generated for 1 hour – See fault F15.
A06
No flame after the ignition phase (6 times in 4 minutes) – Ionisation electrode fault, flame unstable, gas valve offset fault, air/fume ducts obstructed or trap is blocked – Check the ionisation electrodes are correctly positions and change if necessary, check the burner, check the offset adjustment at minimum power, remove the obstruction from the flue, flue extraction ducts and air inlet and terminals or check the trap and clean if necessary.
F07
High fume temperature – Flue partially obstructed or insufficient – Check the efficiency of the flue, fume extraction ducts and outlet terminal and check the correct positioning and operation of the fume sensor.
F10
Delivery sensor fault – Sensor damaged or wiring shorted or damaged – Check the wiring or replace the sensor.
F11
Return sensor fault – Sensor damaged or wiring shorted or damaged – Check the wiring or replace the sensor.
F12
Domestic hot water fault – Sensor damaged or wiring shorted or disconnected – Check the wiring or replace the sensor.
F13
Fume sensor fault – Sensor damaged or wiring shorted or disconnected – Check the wiring or replace the probe.
F14
Delivery sensor 2 fault – Sensor damaged or wiring shorted or disconnected – Check the wiring or replace the sensor.
F15
Fan fault – No 230V power supply, tachometer signal interrupted or fan damaged – Check the 3-pin connector wiring, check the 5-pin connector wiring and check the fan.
F34
Supply voltage under 170V – Electric mains trouble – Check the electrical system.
F35
Faulty mains frequency – Electric mains trouble – Check the electrical system.
F37
Flowswitch or pressure switch contact open – Insufficient system pressure or circulation, circulating pump not working or wrong card parameter setting – Check the system water pressure or for air in the system, check the circulating pump or check the card parameter and modify it if necessary.
F38
Flowswitch contact blocked or closed – Clean the flowswitch or replace if necessary.
F39
External probe fault – Probe damaged or wiring shorted – Check the wiring or replace the sensor.
A41
Sensor positioning – Delivery sensor disconnected from the pipe – Check the correct positioning and operation of the heating sensor.
A42
Heating sensor fault – Sensor damaged – Replace the sensor.
F42
Heating sensor fault – Sensor damaged – Replace the sensor.
F50
Cascade temperature sensor fault – Sensor damaged or wiring shorted or disconnected – Check the wiring or replace the sensor.
A61
Controller DBM12 fault (internal error) – Check the earth connection and replace the controller if necessary.
A62
No communication between the controller and gas valve – Controller not connected or valve damaged – Connect the controller to the gas valve or replace the gas valve.
A63, A64, A65 or F66
Controller DBM12 fault (internal error) – Check the earth connection and replace the controller if necessary.
