• Baxi Boiler Error Codes

Listed below are Baxi boiler fault codes and Baxi boiler Manuals.

Fault Code
Possible Cause
110 Over heated – try bleeding your radiators
117 Water pressure too high
118 Water pressure too low
125 Water circulation fault
133 Safety time to establish flame exceeded
E10 Outdoor Sensor Error
E20 Central Heating Thermistor Sensor Fault
E28 Flue Thermistor Fault
E54 HW Flow Sensor Fault
E78 Water Pressure Sensor Fault
E100 Internal Clock Time Error on PCB
E109 Poor Circulation
110 Overheat – try bleeding your radiators
111 Maximum Limit of Flow Temperature
117 Water pressure too high
118 Water pressure too low
119 System Pressure Low
125 Water circulation fault
127 Legionella Protection Temperature not reached
128 Loss of flame during operation
133 Safety time to establish flame exceeded
153 Forced reset unit unlocked
160 Fan Fault
162 Air pressure switch error
164 Heating flow switch error (Ireland) Pressure Sensor Error (UK)
166 Air Pressure Switch Fault
270 Dry Fire
432 Earth connector error
433 Heat exchanger temperature exceeded (greater than 95 degrees)
1 Green Flash Boiler temp reached – No action requiRed
3 Green Flashes Temporary Flame Loss – boiler will self reset, if continues will go to 3 Red Flashes
4 Green Flashes Communication error between PCB and Control – temporary error, will self reset
5 Green Flashes Parameter Error On PSU/PCB – temporary error, will self reset
6 Green Flashes Miscellaneous Error – temporary error, will self reset
1 Red Flash Sensor Error; Sensor Fault, Temperature Fault or Flow Fault
2 Red Flashes Boiler overheat tripped
3 Red Flashes Ignition fault. Boiler has attempted to light 5 times and failed
4 Red Flashes Fan Fault
5 Red Flashes Parameter or PSU Error
6 Red Flashes Miscellaneous Error

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Fault Code
Possible Cause
E110 Over heated – try bleeding your radiators
E119 Water pressure too low
E125 Overheat – try bleeding your radiators
E131 Overheat lock out – this may follow a power cut, try resetting
E133 Gas supply fault
E168 PCB lock out – may follow a power supply problem, try resetting

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Fault Code
Possible Cause
E110 Over heated – try bleeding your radiators
E119 Water pressure too low
E125 Overheat – try bleeding your radiators
E131 Overheat lock out – this may follow a power cut, try resetting
E133 Gas supply fault
E168 PCB lock out – may follow power supply problem; try resetting
110 Over heated – try bleeding your radiators
E20 Central Heating Thermistor Sensor Fault
E28 Flue Thermistor Fault
E160 Fan Fault
E161 Fan Fault
E164 Heating Flow Switch Error (Ireland) Pressure Sensor Error (UK)
E167 PCB Fault
E193 Circulation fault

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Fault Code
Possible Cause
1 Green Flash Boiler temperature reached – no action required
3 Green Flashes Communication error between PCB and Control – this is a temporary error, the system should reset on it’s own
4 Green Flashes Temporary flame loss – this is a temporary error, the system should reset on it’s own
5 Green Flashes Parameter Error On PSU/PCB – this is a temporary error, the system should reset on it’s own
6 Green Flashes Sensor Error; Sensor Fault, Temperature Fault or Flow Fault – this is a temporary error, the system should reset on it’s own
1 Red Flash Miscellaneous Error
2 Red Flashes Boiler overheat tripped
3 Red Flashes Ignition fault. Boiler has attempted to light 5 times and failed
4 Red Flashes Fan Fault
5 Red Flashes Parameter or PSU Error
6 Red Flashes Miscellaneous

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Fault Code
Possible Cause
E0 Temperature sensor fault
E1 Over heated – try bleeding your radiators
E2 Poor Circulation – try bleeding your radiators
E3 PCB fault
E4 Poor circulation – ensure gas supply is turned on, if meter is a prepayment type ensure there is credit
E7 Ignition failure – try bleeding your radiators
E10 Poor/No circulation
E12 PCB Fault
E13 Heat exchanger thermal fuse tripped
E83 / 84 / 85 / 86 / 87 Fan fault normally E8

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Fault Code
Possible Cause
E53 Poor combustion – flue terminal may be blocked
E110 Over heated – try bleeding your radiators
E117 System water pressure high – try bleeding water from your radiators
E118 System water pressure low
E125 Overheat – try bleeding your radiators
E133 Gas supply fault
E4 Ignition failure
E09 Gas valve wiring fault
E10 Outdoor sensor error
E15 Gas valve connection fault
E20 Flue thermistor fault
E28 Central heating thermistor sensor fault
E40 Central heating return thermistor fault
E53 Flue obstruction
E55 Calibration requiRed
E78 Combustion test alarm during auto-setting
E92 Water pressure sensor fault
E109 Poor circulation
E110 Boiler overheat tripped
E117 stem pressure high (>2.9 Bar)
E118 System pressure low( < 0.5bar
E125 Primary water circulation fault
E128 Loss of flame during operation
E129 Loss of flame during calibration
E133 Ignition fault
E135 Internal error
E154 Primary flow fault
E160 Fan fault
E270 Wrong power supply (Hz)
E317 Dry fire
E321 Not water thermistor fault
E384 Flame detected when gas valve off
E385 Low voltage (less than 195v)
6 Green Flashes Miscellaneous Error – temporary error, will self reset
1 Red Flash Sensor Error; Sensor Fault, Temperature Fault or Flow Fault
2 Red Flashes Boiler overheat tripped
3 Red Flashes Ignition fault. Boiler has attempted to light 5 times and failed
4 Red Flashes Fan Fault
5 Red Flashes Parameter or PSU Error
6 Red Flashes Miscellaneous Error

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Fault Code
Possible Cause
Flash off on Over heated – try bleeding your radiators
Flash on Flash PCB fault
Flash on on PCB fault
E10 Outdoor sensor error
E20 Central Heating Thermistor Senor Fault
E28 Flue Thermistor Fault
E110 Boiler Overheat tripped – try bleeding your radiator
E119 Low water pressure
E125 Primary Water Circulation Fault – try bleeding your radiators
E131 Flue overheat lock out – this may follow a power cut, try resetting
E133 Ignition fault
E160 / E161 Fan Fault
E164 Heating Flow Switch Error (Ireland) Pressure Sensor Error (UK)
E167 PCB Fault
E193 Circulation fault

  • To get your Baxi Boiler Repaired, call us today on Cardiff 02920 140240

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