Table of Contents
What are boiler fault codes?
Boiler fault codes are alphanumeric or numeric indicators generated by a boiler’s control system to communicate specific issues or malfunctions within the heating system. These codes help both homeowners and service professionals identify and diagnose problems quickly, allowing for efficient troubleshooting and repair.
Ferroli Boiler Error codes
Ferroli boilers are known for their excellent design which is aesthetically pleasing. However, boilers of top quality do something tend to have certain issues. On this page you will find the error codes or faults of Ferroli boilers and what they indicate, in addition to possible ways to fix these issues.
Dante Ferroli first established the company in 1955. The original head office is situated in San Bonifacio, close to the Italian city of Verona. Ferroli has a network of branches which operates in over 14 countries across Asia and Europe. That is why they are a well-known manufacturer in the heating industry.
Their main aim, for over 60, has been to lead an innovative approach in the heating industry and to manufacture appliances which are highly efficient, well-built and suitable to a wide range of specifications.
Ferroli takes great pride in their ability to provide fantastic service to its customers. In 2017, the Ferroli BlueHelix Tech 25C was voted to be the best boiler and as well as the Best Purchase in the Italian magazine of AltroConsumo.
Read more: The Best Brands of System Boilers & Pricing
What are Ferroli iBoiler Error Codes?
Ferroli Bluehelix Tech Error Codes
| Fault Code | The Problem | 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 – 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 the valve |
| A64 | Maximum number of consecutive resets exceeded | Maximum number of consecutive resets exceeded |
| F66 | – | Firmware not loaded successfully |
Ferroli iBoiler Error Codes
| Fault Code | The Problem |
| 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 the 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 |
Read more: Combi boilers common faults
Ferroli Modena HE Combi Error Codes
| Fault Code | The Problem |
| 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 mainboard 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 – the 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, the 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 |
Read about: Intergas Boiler Error Codes / Fault
Ferroli Modena HE System Error Codes
| Fault Code | The Problem |
| 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 broke |
| 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 the 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 |
Read about: Ravenheat Boilers Error Codes / Fault Codes List
Ferroli Discontinued Boiler Error Codes of:
- DOMIcondens HE 26 C
- OPTIMAX HE PLUS 31C boiler
- OPTIMAX HE PLUS 38C boiler.
| Boilers | Fault Code | The Problem |
| 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 |
However, in some cases, getting a new boiler might be more cost-effective than getting your old boiler fixed. Some issues might be costly to fix. What is more, a new boiler will probably be more efficient and can help you save both money and energy. That is why getting a new boiler is a good investment in the long run.
Read about: Common Sime Boiler Error Codes
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How to reset a Ferroli Boiler?
Resetting a Ferroli boiler is a common procedure to address certain issues or errors. Here are general steps to reset a Ferroli boiler:
- Locate the Reset Button:
- Find the reset button on your Ferroli boiler. This button is often on the control panel or near the display.
- Turn Off the Boiler:
- Switch off the boiler using the main power switch or by turning off the electricity supply to the unit.
- Wait for a Few Seconds:
- Allow the boiler to remain off for about 10-15 seconds. This brief pause helps reset the internal electronics.
- Press and Hold the Reset Button:
- Press and hold the reset button. While holding it down, turn the boiler back on.
- Continue Holding Until Reset:
- Keep the reset button pressed until you see a change in the display or until the boiler goes through its reset sequence. This may take a few seconds.
- Release the Reset Button:
- Once the reset process is complete, release the reset button.
- Monitor the Boiler:
- Observe the boiler’s operation to see if the issue has been resolved. Check for any error codes or fault indicators.
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FAQs
Do Ferroli still make boilers?
Italian boiler manufacturer Ferroli has been at the leading edge of heating appliance design and development for more than half a century and now operates in over 100 countries worldwide.
Why won’t my Ferroli boiler fire up?
If your boiler is failing to fire up and just going into lock-out, it can be a problem with the PCB (printed circuit board), but you can check this by testing with a vault meter to see if electricity is reaching the PCB whilst still remaining unresponsive.
What pressure should my Ferroli boiler be?
Your boiler gauge should show that the boiler pressure is between 1.0 and 2.0. If the pressure drops below 1.0, then you’ll need to repressurise it.