Ferroli Boiler Fault Codes & Common Errors

Has your boiler issued a fault code? Don't worry, this may not be as bad as it seems, a lot of fault codes can be simple to fix and just require a reset as opposed to an engineer visiting your home.

On this page we have compiled for you a list of the Ferroli boiler errors, so you can find out more about the information displayed on your boiler and understand the potential cause.

If you are still not able to fix the issue then one of our expert boiler engineer partners may be able to help you, free of charge. All you have to do is simply fill out the contact form and they will be in touch.

"A" Ferroli Boiler Fault Codes

If your Ferroli boiler is displaying a "A" related boiler fault code then you can find the potential cause and the models affected by it in the table below:

Fault CodePotential CauseModel(s) Affected
A01No burner ignition or burner fails to lightOptimax HE Plus 31C . 38C / DOMIcondens HE 26C
A02Possible electric fault as present flame signal with burner offDOMIcondens HE 26C / Optimax HE Plus 31C / 38C
A03Protection activated from temperature being exceededDOMIcondens HE 26C / Optimax HE Plus 31C / 38C
A04Fume thermostat faultDOMIcondens HE 26C / Optimax HE Plus 31C
A04Safety device activated due to fume extractionOptimax HE Plus 38C
A05Fault with the fan or fume pressure / fan protection activatedDOMIcondens HE 26C / Optimax HE Plus 31C / 38C
A06No flame after ignitionDOMIcondens HE 26C / Optimax HE Plus 31C / 38C
A09Faulty gas valveDOMIcondens HE 26C
A16Faulty gas valveDOMIcondens HE 26C
A21Fail due to poor combustionDOMIcondens HE 26C
A23Within 4 minutes nominal water pressure has not been reachedDOMIcondens HE 26C
A244 filings within 24 hoursDOMIcondens HE 26C
A34Voltage supply under 170 / 180VDOMIcondens HE 26C / Optimax HE Plus 31C / 38C
A35Faulty mains frequency or frequency anomalyDOMIcondens HE 26C / Optimax HE Plus 31C / 38C
A37Water pressure incorrectDOMIcondens HE 26C / Optimax HE Plus 31C / 38C
A39Fault with external probeDOMIcondens HE 26C / Optimax HE Plus 31C / 38C
A41Sensor positioningDOMIcondens HE 26C / Optimax HE Plus 31C / 38C
A43Exchange protection activationDOMIcondens HE 26C
A50Fault with gas valveDOMIcondens HE 26C
A51Fault due to poor combustionDOMIcondens HE 26C
A62No communication between electronic controller and gas valveOptimax HE Plus 31C / 38C

"F" Ferroli Boiler Fault Codes

In this section you can find a list of the Ferroli boilers "F" fault codes:

Fault CodePotential CauseModel(s) Affected
F07Temperature of fume too highOptimax HE Plus 31C / 38C
F07Card parameterDOMIcondens HE 26C
F10Delivery sensor 1 faultDOMIcondens HE 26C / Optimax HE Plus 31C / 38C
F11DHW or return sensor faultDOMIcondens HE 26C / Optimax HE Plus 31C / 38C
F13Sensor fault with fumeOptimax HE Plus 31C / 38C
F14Delivery sensor 2 faultDOMIcondens HE 26C / Optimax HE Plus 31C / 38C
F15Fault with fanOptimax HE Plus 31C / 38C
F20Fault with combustion controlDOMIcondens HE 26C
F42Fault with heating sensorDOMIcondens HE 26C / Optimax HE Plus 31C / 38C