Common Ferroli boiler error codes

Welcome to the Maintracts Services blog, your trusted resource for all things Ferroli boilers! With a remarkable history dating back to 1974, Maintracts Services has been a leading provider of top-notch heating services.

Our team of expert heating engineers possesses extensive experience in dealing with Ferroli boilers, offering a comprehensive range of services including boiler installation, servicing, and boiler repair services in London. In today’s blog post, we will be addressing a topic of utmost importance for Ferroli boiler owners and technicians: common Ferroli boiler error codes.

These error codes can be puzzling, but fret not! We are here to provide you with valuable insights into what these error codes mean and how to effectively troubleshoot them.

Whether you’re a homeowner, landlord, or heating professional, join us as we unveil the secrets of Ferroli boiler error codes, helping you maintain optimal performance and reliability for your heating system.

Ferroli Boiler Error Codes

Fault code	System behaviour
A01	Ignition error – possible electrode fault or power too low, no gas or excessive condensate level
A02	Electrode or card error
A03	Heating sensor damaged, no water circulation or air in system
F04	Wrong card parameter setting
F05	Air pressure switch contact error – wrong flue baffle obstructed or not correctly sized
A06	No flame after the ignition phase – low pressure in gas system burner minimum pressure setting
F07	Air pressure switch error – contacts closed on activation of fan
A09	Gas valve error – wiring could be disconnected or error with gas valve
F10	Delivery sensor error, sensor damaged wiring shorted or disconnected
F11	Domestic hot water (DHW) sensor error – sensor damaged, wiring shorted or disconnected
A15	Fault F05 generated 5 times within the last 24 hours – possible error with the air pressure switch
A16	Gas valve error – wiring disconnected or faulty gas valve
A23	Card parameter error – possibly wrong card parameter setting
A24	Card parameter error – possibly wrong card parameter setting
F34	Supply voltage under 170V – electric mains error
F35	Faulty mains frequency – electric mains error
F37	Error with system water pressure, possible pressure too low or water pressure switch is damaged
F43	Exchanger protection intervention – could be because no system water circulation or there’s air in the system
F50	Controller DBM23B error – controller could have an internal error
F51	Controller DBM23B error – controller could have an internal error

Ferroli Bluehelix Tech Error Codes

Fault code	System behaviour	Possible cause
A01	No burner ignition	No gas or ignition – issue with detection electrode, faulty gas valve or insufficient gas supply pressure
A02	Flame signal present with burner off	Electrode error or PCB error
A05	Fan error	No 230V power supply or tachometric signal interrupted fan damaged or out of balance
A06	No flame after the ignition phase	Ionisation electrode fault – flame unstable or air/flue ducts obstructed or condensate trap or pipes blocked
F07 – F14 – A07	High flue gas temperature	The flue gas probe detects excessive temperature
F08 – A08	Overtemperature protection intervention	Heating sensor damaged – no water circulation in the system or air in the system
F09 – A09	Overtemperature protection intervention	Return sensor damaged – no water circulation in the system or air in the system
F10 – A10	Flow sensor error	Sensor damaged – wiring shorted or wiring disconnected
F11 – A11	Return sensor fault	Sensor damaged – wiring shorted or wiring disconnected
F12	DHW sensor error	Sensor damaged – wiring shorted or wiring disconnected
F13 – A13	Flue probe fault	Probe damaged – wiring shorted or wiring disconnected
A14	Flue extraction duct safety device intervention	Fault F07 generated 3 times in the last 24 hours
F34	Supply voltage under 170V	Electric mains trouble
F37	Incorrect system water pressure	Pressure too low – water pressure switch either damaged, blocked or not connected
F39	Optional external probe error	Probe damaged or wiring shorted – probe disconnected after activating the outside temperature mode
F41	Activation of maximum ELTA T protection	Heating sensor damaged, return sensor damaged, no water circulation as air in the system
F42 – A42	Sensor control protection activation	Heating sensor damaged, return sensor damaged or disconnected
F43	Exchanger protection intervention	No system water circulation – air in system
A23 – A24 – A26 – F15 – F20 – F21 – F40 – F47 – F50 – F51 – F53	Printed circuit board (PCB) parameter fault	Wrong PCB parameter setting
F56 – A56	Calibration error / calibration procedure not completed	Incorrect parameters electrode damaged or not correctly positioned
F61 – A61	Printed circuit board (PCB) AGC01 error	PCB AGC01 internal error
A54 – A55 – A63	Printed circuit board (PCB) AGC01 fault	PCB AGC01 fault
F67	–	Boiler chip card (BCC) service key connected
F68 – A68	Boiler chip card (BCC) service key fault	Error loading BCC service key file
A62	No communication between PCB and gas valve	PCB not connected – valve damaged, replace valve
A64	Maximum number of consecutive resets exceeded	Maximum number of consecutive resets exceeded
F66	–	Firmware not loaded successfully

Ferroli Modena HE System Error Codes

Fault code	System behaviour
A01	No burner ignition – possible electrode error, defective gas valve or incorrect inlet gas pressure
A02	Flame detected with the burner off – electrode defective main board defective
A03	High limit protection – possible flow temperature sensor not active or incorrectly located, no system circulation
A04	Flue gas fault – fault F07 happened 3 times in the last 24 hours
A05	Fan error – tachometer signal interrupted for 1 hour or longer
A06	No flame after the ignition phase – electrode error, flame unstable, incorrect valve gas offset or flue gas circuit obstructed
A41	Flow sensor error – sensor disconnected
A42	Flow sensor error – sensor damaged
F07	High fume temperature – the exchanger probe detects an excessive temperature
F10	Flow sensor error – sensor damaged, short circuited, sensor damaged or wiring broken
F11	Return sensor error – t-sensor damaged, short circuited, sensor damaged or wiring broken
F13	Exchanger probe error – t-sensor damaged, short circuited, sensor damaged or wiring broken
F14	Flow sensor error – t-sensor damaged, short circuited, sensor damaged or wiring broken
F15	Fan problem – tachometer signal interrupted fan connection or damaged debris in fan. You need to check and clean fan debris
F34	Supply voltage under 170v – electric supply error
F35	Irregular mains frequency – electric supply problem
F37	Incorrect system water pressure error – possible sensor damaged or pressure too low
F43	Exchanger protection activation – no system circulation air in system
F52	Flow sensor – fault sensor damaged
A61	Controller ABM03B error – controller has an internal error
A62	No communication between controller and gas valve – controller not connected or valve damaged
A63 / A64 / F66	Controller ABM03B error – controller internal error

Ferroli Modena HE Combi Error Codes

Fault code	System behaviour
A01	No burner ignition – possibly no gas, detection or ignition electrode fault, defective gas valve, incorrect inlet gas pressure
A02	Flame detected with the burner off – possibly caused by ionisation, defective electrode or main board defective. Check the printed circuit board (PCB) or ionizing electrode wiring
A03	High limit protection – flow temperature sensor not active, incorrectly located or no system circulation. Check the position of the flow sensor or check pump and radiator valves
A04	Flue gas fault – could be because F07 happened 3 times in the last 24 hours – check the flue
A05	Fan problem – tachometer signal interrupted for 1 hour or longer – check the wiring and the fan
A06	No flame after ignition phase – possible causes: detection electrode fault, flame unstable, incorrect valve gas offset, flue gas circuit
A41	Flow sensor disconnected – check the correct positioning and operation of the flow sensors
A42	Flow sensor fault – sensor needs changing
F07	High fume temperature – the exchanger probe detects an excessive temperature for over 2 minutes – check the exchanger.
F10	Flow sensor fault – possible causes: sensor damaged, short circuited or wiring broken check the wiring
F11	Return sensor fault – sensor wiring shorted or broken – check the wiring
F12	Domestic hot water (DHW) sensor fault – sensor damaged, wiring shorted or wiring disconnected – check the wiring
F13	Exchange probe fault – wiring shorted or wiring broken – check wiring
F14	Fan problem – tachometer signal interrupted fan connection. Fan damaged or debris in fan – check the wiring, the fan and clean debris
F15	Supply voltage under 170v – electric supply problem – the electrical system needs checking
F34	Irregular mains frequency – possible electric supply problem – the electrical system needs checking
F35	Incorrect system water pressure – possible cause is pressure too low or sensor damaged – the system may need filling or check the sensor
F37	External probe fault sensor damaged or short circuited – check the wiring
F39	Exchanger protection activation – possibly caused by no system circulation, air in the system or sensor damaged
F43	Flow sensor fault – sensor damaged – sensor needs changing
F52	Controller 041049G0 fault – controller internal error
A61	No communication between controller and gas valve controller – could not be connected or valve damaged
A62	Controller 041049G – internal error
A63 / A64 / F66	Controller DBM12 fault

Ferroli Discontinued Boiler Error Codes

Find below a list of error codes for discontinued Ferroli boilers, including:

• Ferroli DOMIcondens HE 26 C
• Ferroli OPTIMAX HE PLUS 31C boiler
• Ferroli OPTIMAX HE PLUS 38C boiler

Boilers	Fault code	System behaviour
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C	A01	No burner ignition
OPTIMAX HE PLUS 38C	A01	The burner fails to light
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	A02	Flame present signal with burner off, possible electrical fault
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	A03	Over temperature protection activation
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C	A04	Fume thermostat fault
OPTIMAX HE PLUS 38C	A04	Fume extraction duct safety device activation
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C	A05	Fan fault or fume pressure switch fault
OPTIMAX HE PLUS 38C	A05	Fan protection activated
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	A06	No flame after the ignition phase
OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	F07	High fume temperature
DOMIcondens HE 26 C	F07	Card parameter
DOMIcondens HE 26 C	A09	Gas value fault
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	F10	Delivery sensor 1 fault
DOMIcondens HE 26 C	F11	DHW sensor fault
OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	F11	Return sensor fault
OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	F13	Fume sensor fault
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	F14	Delivery sensor 2 fault
OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	F15	Fan fault
DOMIcondens HE 26 C	A16	Gas valve fault
DOMIcondens HE 26 C	F20	Combustion control fault
DOMIcondens HE 26 C	A21	Poor combustion fail
DOMIcondens HE 26 C	A23	Set nominal system water pressure not reached within 4 minutes
DOMIcondens HE 26 C	A24	4 fillings within 24 hours
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	A34	Supply voltage under 170V / 180V
DOMIcondens HE 26 C	A35	Faulty mains frequency
OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	A35	Mains frequency anomaly
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	A37	Incorrect system water pressure
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	A39	External probe fault
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	A41	Sensor positioning
DOMIcondens HE 26 C / OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	F42	Heating sensor fault
DOMIcondens HE 26 C	A43	Exchange protection activation
DOMIcondens HE 26 C	A50	Gas valve fault
DOMIcondens HE 26 C	A51	Poor combustion fault
OPTIMAX HE PLUS 31C boiler / OPTIMAX HE PLUS 38C	A62	No communication between electronic controller and gas valve

if you are experiencing issues with your Ferroli boiler? Our team of certified local plumbers in London is here to help! We understand how crucial it is to have a reliable heating system, which is why you can trust our expertise. We also offer emergency gas boiler repair services for your peace of mind. Browse our customer testimonials for reassurance or reach out to us to discuss your needs today!