Baxi boiler error codes

With the help of Baxi boiler error codes table one can significantly optimize functioning and repairs of heating appliances of this make. There is a table below with a brief description of each of the codes, which can be specified on a Baxi unit monitor.

Baxi Bioflo boiler error codes

CodeMeaning/effectCause/remedy
IN 581Replenish fuel
The reserve supply container is almost empty.Top up pellets.
Fill fuel into the fuel container (see section 2.3).
IN 582Reserve supply container empty
The reserve supply container is empty. Top up pellets. Burner is locked.
Fill fuel into the fuel container (see section 2.3).
IN 590Clean boiler and burner
Perform cleaning and confirm in operator level.
Boiler and burner are still operating.
Boiler and burner must be cleaned or the both ash pan(s) (see Fig. 162) emptied (see sections 3.4, 3.5 and 3.6). Following cleaning, confirm cleaning on the Info panel operator level (see section 2.8.1.1).
IN 595Door open
Burner locked. Only open the door when the burner is switched off.
Cladding door is open, burner locked.
a) Close the cladding door.
b) Door switch on cladding door does not switch correctly, adjust see installation instructions.
FE 206Monitoring of the auger conveyor is defective
Press Reset.
The boiler is in operation.
Press the Reset button. If the fault reoccurs after a reset, inform BAXI Customer Service or a heating technician.
FE 356Combustion chamber pressure not stable
Press Reset.
The boiler is in operation.
a) Heating surface cover leaking, check whether this is firmly closed (see section 3.8), press the Reset button.
b) Combustion chamber and ash door are leaking check the seal, replace the seal if necessary, press the reset button.
c) Pressure measuring nipple of combustion chamber pressure switch is blokked clear it (see section 3.9.1), press the reset button.
d) Intake air line or induction opening at rear is blocked clear it and press the reset button.
e) Exhaust pipe or flue is blocked, clear it and press the reset button.
f) Combustion chamber pressure switch is defective, inform BAXI Customer Service or a heating technician.
FE 382Fill level switch in reserve supply container defective
Check the switch in the reserve supply container. Press Reset.
The boiler does not operate.
a) Fill level switch (proximity switch) dirty, remove the dust (see section 3.7), press the Reset button.
b) Fill level switch (proximity switch) in the reserve supply container defective inform BAXI Customer Service or a heating technician.
FE 390Emergency operation!
Clean boiler and burner
Perform cleaning and confirm in operator level.
The boiler is in cyclic operation, i.e. has idle times.
a) Boiler and burner must be cleaned or the both ash pan(s) (see Fig. 108) emptied (see sections 3.4, 3.5 and 3.6). Following cleaning, confirm cleaning on the Info panel operator level (see section 2.8.1.1).
b) Motor or limit switch of ash compactor defective, inform BAXI Customer Service or a heating technician.
AL 005Shake-out defective
Shake-out defective or sticking. Clean the burner pot. Press Reset.
Shake-out motor no longer moves or no longer reaches the end position, boiler switches to burnout mode.
a) Burner contamination; close combustion chamber doors, press reset button; once the alarm message is rectified, clean the burner pot as described in section 3.6.
The glow ignition is located in the primary air tube so avoid sha/ ! \ king the burner pot violently risk of breakage!
If the alarm message remains active, clean the burner pot as described in section 3.6. Note: Grate olate at too can onlv be raised and removed when closed. If the grate plate is not fully closed, vacuum it out. Close combustion chamber door, press reset button, if the alarm message remains in place, repeat the process or inform Baxi Customer Service or a heating technician.
b) Grate plate not inserted correctly or check correct installation position {see section 3.6).
c) Motor for shake-out defective, inform BAXI Customer Service or a heating technician.
d) Limit switch defective, inform BAXI Customer Service or a heating technician.
AL 006Auger conveyor motor defective
Auger conveyor motor defective. Press Reset.
Boiler enters burnout mode, vacuum fan is stopped immediately.
a) Auger conveyor or rotary feeder jammed due to a foreign body, clean the reserve supply container, opening above auger conveyor or rotary feeder (see section 3.9) and remove the foreign body. Press the Reset button.The alarm message AL 171 may light on up to 2 occasions until the boiler starts operating again, press the Reset button.
b) Control thermostat defective, inform Baxi Customer Service or a heating technician.
c) Press the Reset button. If the malfunction recurs immediately after a short period, or recurs at regular intervals, contact Baxi Customer Service or your heating technician.
d) Renew the auger conveyor motor, inform Baxi Customer Service or a heating technician.
AL 016Vacuum fan defective
Clean blower wheel and blower box. Press Reset.
The actual speed is different from the nominal speed.The boiler switches to burnout mode.
a) The blower wheel and blower box are dirty, press the Reset button.
If the malfunction recurs immediately after a short period, or recurs at regular intervals, contact Baxi Customer Service or your heating technician.
b) Replace the vacuum fan motor, inform Baxi Customer Service or a heating technician.
AL 062Air intake/exhaust flap defective
Air intake/exhaust flap defective or not opening. Check flap. Press Reset.
External air choke (optional) does not open.
a) Check the air choke, press the Reset button.
b) Inform Baxi Customer Service or a heating technician.
AL 071Safety / emergency switch open
Check switch position of safety / emergency switches.
Boiler enters burnout mode but the blower does not run. Switch on emergency heating/OFF switch.
AL 076Boiler sensor defective
Check the boiler sensor and connections. Press Reset.

The boiler switches to burnout mode.
a) Press the Reset button. If the malfunction recurs immediately after a short period, or recurs at regular intervals, contact Baxi Customer Service or your heating technician.
b) Replace the boiler sensor, inform Baxi Customer Service or a heating technician.
AL 078Thermocontrol sensor defective
Check the thermocontrol sensor and connections. Press Reset.
The boiler switches to burnout mode.
a) Thermocontrol sensor is too cold < 0 ®C. Sensor warm up.
b) Press the Reset button. If the malfunction recurs immediately after a short period, or recurs at regular intervals, contact Baxi Customer Service or your heating technician.
c) Replace the thermocontrol sensor, inform Baxi Customer Service or a heating technician.
AL128No flame formation in control mode
Clean boiler and burner.
Press Reset.
The flame goes out in modulation mode.The boiler switches to burnout mode.
a) Clean the burner and the boiler. Check the exhaust pipe to the flue and clean it if necessary, press the Reset button.
b) Auger conveyor or rotary feeder jammed due to a foreign body. Clean the reserve supply container, opening above auger conveyor or rotary feeder (see section 3.7) and remove the foreign body. Press the Reset button.The alarm message AL 171 may light on up to 2 occasions until the boiler starts operating again, press the Reset button.
c) Inform Baxi Customer Service or a heating technician.
AL 133Safety temperature shutdown
Check the system and filling pressure. Press Release button on boiler.
Boiler temperature is above 100 °C, boiler enters burnout mode, vacuum fan is switched off immediately.
a) Check the water level or pressure in the heating system refill, bleed the air.
b) Air in the heating system bleed air.
c) The heat pump or boiler feed pump is sticking or is defective start pump manually or have it repaired.
Once the boiler water temperature falls below 90 ®C, remove the cover, press the Release button of the safety thermostat B7 firmly Fig. 163.
If the malfunction occurs after a short period, or recurs at regular intervals, contact Baxi Customer Service or your heating technician.
AL 135Excess temperature in the auger tube
Check the burner. Press Release button B7a on control panel.
The boiler switches to burnout mode.
a) Check the burner, remove all pellets from the burner pot.
b) Remove the cover from the safety thermostat auger tube B7a. press the Release button firmly (see Fig. 163). If the ignition does not function first time (AL 171), press the Reset button (pellets in the auger conveyor will have been damaged due to the higher temperature).

Baxi EcoBlue Heat 12 boiler error code

Status signalDescriptionCauseRemedial actions by service engineer
1 flash greenTemperature protection
• Maximum flow temperature exceeded,
• Flow temperature rise rate too high,
• Excessive difference between flow and return temperature
• Check system circulation & pump operation
• Check demands for boiler operation (switched live operation)
• Check temperature setting
• Check temperature sensors in boiler
2 flashes greenShutdown input• BL terminals on User Interaction Controller are open circuit• If condensate pump is wired to these terminals check operation of condensate pump
• Check wiring to BL terminals (link present or connections to external device correct)
3 flashes greenFlame loss• No flame detected during operation• Check gas supply is turned on and gas is available if on a pre-payment meter
• Check flue condition
4 flashes greenCommunication fault
• Bad connection or wiring fault
• Internal communication fault
• Check wiring/connections between boiler and User Interaction Controller and within the box
• If necessary replace control/fan assy
5 flashes greenParameter fault• Parameter error or faulty PU
• Configuration error or PCB fault
• Replace PU and recommission
• Replace control/fan assy
6 flashes greenMiscellaneous• Internal fault in combustion control unit• Replace combustion control unit
1 flash redSensor error• Bad connection to flow or return temperature sensor
• Fault with flow or return temperature sensor(s)
• Low or no flow through boiler
• Reverse flow through boiler
• Check connections to temperature sensors/PCB and condition of wiring loom
• Check resistance of temperature sensors
• Check pump operation and system circulation
2 flashes redHigh temperature protection
• Over-temperature thermostat on heat exchanger activated
• No water flow through heat exchanger
• Over-temperature thermostat fault or bad connection (open circuit).
• PCB over-temperature condition
• Flue fault resulting in recirculation or activation of air pressure switch (if fitted)
• Check connections to and operation of OfT thermostat and air pressure switch (if fitted) and PCB and condition of wiring loom
• Check system pressure or that system is not air-locked
• Check pump operation and system circulation
• Check flue condition
3 flashes redIgnition fault• No ignition
• No flame detected following ignition
• False flame signal detected
• Repeated loss of flame detected
• Check earthing of the appliance
• Check ignition electrode condition and clean/replace if necessary
• Check gas valve operation
• Check flue condition
• Check correct combustion/gas valve settings
• Check condensate drain for blockage
4 flashes redFan fault• Fan calibration error
• Fan failure
• If fan operates, check flue installation and condition.
• Replace control/fan assy
5 flashes redParameter fault• Bad connection to PU
• Parameter error or faulty PU
• PCB and condition of wiring loom
• Replace PU and recommission
6 flashes redMiscellaneous• Bad connection or wiring fault internal or external to the boiler
• Parameter error
• Communication error
• Check all wiring connections are correctly made
• Using a service tool or Recom software check all parameter settings
• If necessary replace PU and/or control/fan assy

Baxi Ecogen 241.0 boiler error codes

Error code: DisplayDescription
10: Outside sensorFault outside temp sensor 1
20: Boiler flow sensorFault boiler flow temp sensor
40: Boiler return sensorFault return temp sensor boiler
50: DHW tank sensorFault DHWI sensor
60: Room sensor 1Fault room temp sensor HC1
65: Room sensor 2Fault room temp sensor HC2
83: BSB short-circuitBoiler system bus short-circuit
84: BSB address collisionMore then 1 room units are assigned to the same HC Assign one of them to HC2 or assign QAA7x not as room unit
85: Radio communicationCommunication to radio device interrupted
95: Time of day invalidThe real time clock unit detected corrupted time of day.
96: Minor SW failureFailure in Class B-SW: Stack overflow or program sequence failure
127: Legionella temperatureLegionella temperature not achieved within 48 hours
157: Boiler Flow Overheat statBoiler flow overheat thermostat / safety chain open
158: CondensateCondensate switch of safety chain opened
164: FlowIntermitent Low flow or faulty flow detector
257: Pack sensorFault pack temp sensor
258: Pack overtempInternal ambient temperature to high
259: CJC sensorFault cold junction compensation sensor
261: Loss of Engine flameNo flame after five ignition tries in Engine
262: Loss of Supplementary flameNo flame after five ignition tries in Supplementary
263: Engine BCU failureMultiple communication request of Engine Burner Control Unit unsuccessful.
1) Failure caused by BCU
2) BCU Communication Timeout on Main Control Board
264: Supp. BCU failureMultiple communication request of Supp. Burner Control Unit unsuccessful.
1) Failure caused by BCU
2) BCU Communication Timeout on Main Control Board
270: excessive temp. diff.Excessive max temperature difference across the heat exchanger
during 5 minutes or excessive limit temperature difference. If temperature difference fell below (threshold switching differential boiler): automatic reset
when the maximum setting was exceeded immediately
when the limit value was exceeded after 10 minutes
274: Dry fire protection7 l/min boiler flow not detected after 4 minutes
278: Max Temp RiseMaximum flow temperature rise exceeded, automatic reset after 10 minutes
280 : Engine dome overtempEngine dome overtemp has operated
282: G83/ENS/G1MG83/ENS module has detected an unhealthy mains condition
285: Alternator ShortPower monitor 1C has detected a short-circuit condition
287: Eng head under tempEngine head temperature thermocouple measurement below 103 degrees C when the CX relay is energised
298: False flame engineIonisation probe of engine burner detected false flame
299: False flame supplementaryIonisation probe of supplementary burner detected false flame
300: Eng head under tempEngine head control temperature less than 150 degrees C when CX relay is energised
301: Eng head over tempEngine head control temperature greater than 540 degrees C
302: Eng head thermocoupleMagnitude of the difference between the engine head control and limit thermocouples is greater than 100 degrees C
303: Control thermocoupleEngine head control thermocouple failure
304: Limit thermocoupleEngine head limit thermocouple failure
309: Power fail detectionPower failure to fan detected 24v dc supply
310: Power monitor comm.No data received from the power meter 1C in the last 10 seconds or the power monitor failed to register with the EGC microcontroller within 10 seconds of power up
311: EGC comm, failureCommunication timeout or communication failure
421: Eng bu exc temp diff hexEngine burner excessive temperature difference across the heat exchanger
422: BCU Eng bu inconsistentTransmitted state of the engine burner BCU isn't consistent
423: BCU Supp bu inconsistentTransmitted state of the supplementary burner BCU isn't consistent
424: Rep. loss of flame Eng buRepeated loss of flame engine burner
425: Rep. loss of flame Supp burepeated loss of flame supplementary burner

Baxi Megaflo System I5 HE IE boiler error codes

CodeCause
E20Central Heating NTC Fault
E28Rue NTC Fault
EIIOSafety Thermostat Operated
El19Water Pressure Switch Not Operated
El25Circulation Fault (Primary Circuit)
El30Rue NTC Operated
El33Interruption Of Gas Supply or Flame Failure
El60Fan or Fan Wiring Fault
El93Pre-Circulation Fault

 

Error codes and troubleshooting