Navigation Menu










Biasi ActivA boiler fault codes

Are you experiencing a fault with your boiler? If so, call our 24 hour UK call centre on 0844 272 0941. MR Boiler Repairs are the UK’s leading boiler repair and service specialist, providing support for domestic, commercial and residential properties. Our low cost fixed price repair service will provide you with peace of mind and avoid any scary repair bills.

Are you experiencing a fault with your Active A 120v, 150v, 200v or 250v boiler? See the table below to find the details behind the fault code, error and the reason for the boiler fault.  You boiler will be equipped with an internal diagnosis function, the error or fault code will be displayed via the control panel display.

If you require a visit from a Gas Safe service engineer to repair your boiler then book a Biasi boiler repair or a Biasi boiler service today.

Fault code table for the ActivA boiler

Er 01 + Reset                          Lack of burner ignition

Er 02 + Reset                          Safety thermostat lockout

Er 03 + Reset                          Other faults

Er 04 + (spanner)                 Faulty primary circuit (no water or absence of flow)

Er 05 + (spanner)                 Faulty fan control system

Er 06 + (spanner)                Faulty c.h temperature probe

Er 08 + (spanner)                 Faulty external temperature probe NTC (if fitted)

Er 09 + (spanner)                 Faulty flue temperature probe NTC

Er 10 + Reset                          Lockout – flue temperature probe NTC 

                                                (Flue temp > 120c)

Er14 + Reset                           Faulty pump (absence of water flow in the main    circuit) or primary temperature above 105c

Ee15 + Reset                          None or too low water flow; faulty pump (temp. difference between probes higher than 35c)

Er16 + Reset                          Possible exchange of NTC probes (flow or return) or pump wrongly mounted (upside – down)

Er17 + Reset                           Faulty c.h temperature probe NTC (flow or return)

Er18 + Reset                           Faulty primary circuit (no water or absence of flow)

L3                                            Useful output limitation (temperature difference between probes higher than 25c) Boiler test performing

Td                                            Thermostat delayed: Boiler test performing

An 11                                       Parasite flame   

These codes are taken from the user manual of this boiler and should only be

used as guidance only. If you are experiencing a fault then you should only used a

Gas Safe registered engineer to repair or service your Biasi ActivA boiler.










Contact Us for a Quote Now











Book Your Boiler Repair Now











Book your Boiler Service Now