Baxi boiler error codes
Last updated on: 28 October 2024

Baxi boiler error codes & fault codes. What do you need to do?

Boilers can fail at any time, causing worry and tension at the most inconvenient times. Before calling an expert, you can use the fault code guide below to help with troubleshooting and able to determine the next best steps with your boiler, such as resolving the issue yourself looking for a repair or replacement entirely.

When you’re having problems, having a reputable boiler, such as a Baxi boiler, can help. So, here are some Baxi boiler error codes. Let’s start with the most common codes encountered by our skilled heating engineers.

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BAXI 200 COMBI / BAXI 400 COMBI Boiler Error/Fault Codes

Error CodePossible Fault
H.01 – .00Temporary Fault – Temporary loss of communication between the gas valve and boiler board. Fault in air/gas unit.

Loose connection to the gas valve.

H.01 – .05Temporary Fault – Maximum difference between the flow and return temperature exceeded. Non-existent or insufficient circulation. Sensor error.
H.01 – .08Temporary Fault – Flow temperature increasing too fast in heating mode. Non-existent or insufficient circulation.

Sensor error.

H.01 – .14Temporary Fault – Maximum flow temperature value exceeded. Non-existent or insufficient circulation. Non-existent or insufficient circulation.
H.01 – .18Temporary Fault – No circulation of water. Non-existent or insufficient circulation. Sensor error.
H.01 – .21Temporary Fault – Flow temperature increasing too fast in DHW mode. Non-existent or insufficient circulation. Sensor error.
H.02 – .02Temporary Fault – No input of parameters C1/C2. PCB not configured.
H.02 – .03Temporary Fault- Incorrect configuration settings C1/C2.
H.02 – .04Temporary Fault – Parameter error. Incorrect parameters.
H.02 – .06Temporary Fault – System water pressure. Water leak on the boiler. Water leak on the system.
H.03 -.00Temporary Fault – Communication error with NTC flue sensor. Sensor not, or badly connected. Bad connection. Sensor fault.
H.03 -.01Temporary Fault – Communication error with the HMI PCB. HMI is not connected.
H.03 -.02Temporary Fault – No flame during operation. No ionisation current.
E.00 – .04Permanent Fault – Return temperature sensor open-circuit. Sensor not or badly connected. Bad connection. Sensor fault.
E.00 – .05Permanent Fault – Return temperature sensor open-circuit. Sensor not or badly connected. Bad connection. Sensor fault.
E.01 – .02Permanent Fault – Temperature measured by return sensor greater than flow sensor. Bad connection. Sensor fault. Sensor not or badly connected.
E.01 – .04Permanent Fault – Loss of flame detected 5 times in 24 hours (Burner on). No ionisation current.
E.01 – .11Permanent Fault Requiring Reset – Incorrect fan speed. External draught over the boiler. Defective gas/air unit.
E.01 – .12Permanent Fault Requiring Reset – Temperature measured by return sensor greater than flow temperature.
E.01 – .17Permanent Fault Requiring Reset – No circulation. Sensor not or badly connected. Sensor fault.
E.01 – .20Permanent Fault – Maximum flue gas temperature value reached (>140 Deg C). No circulation. Sensor fault.
E.02 – .00Permanent Fault – Boiler reset in progress. The reset button has been pressed.
E.02 – .07No or low system water pressure. Low system pressure (less than 0.5bar) boiler will not function.
E.02 – .16Permanent Fault – Onboard CSU time-out. Check PCB for damage.
E.02 – .17Permanent Fault – Permanent loss of communication between the gas valve and boiler PCB. Fault in air/gas unit. Loose connection to the gas valve.
E.02 – .19Permanent Fault – Jumper 1 changed. Check the position of jumper 1.
E.02 – .20Permanent Fault – Jumper 2 changed. Check the position of the jumper 2.
E.02 – .21Permanent Fault – Jumper 3 changed. Check the position of the jumper 3.
E.02 – .47Permanent Fault – Connection to external device unsuccessful. Check to wire to an external device.
E.02 – .48Permanent Fault – Configuration to external device unsuccessful. Check to pair to external.
E.04 – .00Permanent Fault – Gas valve fault. Gas valve not detected.
E.04 – .01Permanent Fault – Flow temperature sensor short-circuited. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .02Permanent Fault – Flow temperature sensor open-circuited. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .03Permanent Fault – Critical flow temperature reached. Non-existent or insufficient circulation.
E.04 – .04Permanent Fault – Flue temperature sensor short-circuited. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .05Permanent Fault – Flue temperature sensor open-circuited. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .06Permanent Fault – Critical flue gas temperature value reached. No circulation. Sensor fault.
E.04 – .08Permanent Fault – Maximum safe temperature value reached. (Safety thermostat open-circuited). No circulation. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .10Failure to light (could be gas supply issue).
E.04 – .12Permanent Fault – False flame signal. Short-term fluctuation of the mains. Ionization current presents even though there is no flame. The burner remains very hot (CO2 too high). Defective gas/air unit.
E.04 – .13Permanent Fault – Fan rotor blocked. Fan seized. Wiring to fan damaged.
E.04 – .17Permanent Fault – Problem with the gas valve. Defective gas/air unit.

BAXI 200 COMBI / BAXI 400 COMBI Boiler Error/Fault Codes

Error CodePossible Fault
H.01 – .00Temporary Fault – Temporary loss of communication between the gas valve and boiler board. Fault in air/gas unit.

Loose connection to the gas valve.

H.01 – .05Temporary Fault – Maximum difference between the flow and return temperature exceeded. Non-existent or insufficient circulation. Sensor error.
H.01 – .08Temporary Fault – Flow temperature increasing too fast in heating mode. Non-existent or insufficient circulation.

Sensor error.

H.01 – .14Temporary Fault – Maximum flow temperature value exceeded. Non-existent or insufficient circulation. Non-existent or insufficient circulation.
H.01 – .18Temporary Fault – No circulation of water. Non-existent or insufficient circulation. Sensor error.
H.01 – .21Temporary Fault – Flow temperature increasing too fast in DHW mode. Non-existent or insufficient circulation. Sensor error.
H.02 – .02Temporary Fault – No input of parameters C1/C2. PCB not configured.
H.02 – .03Temporary Fault- Incorrect configuration settings C1/C2.
H.02 – .04Temporary Fault – Parameter error. Incorrect parameters.
H.02 – .06Temporary Fault – System water pressure. Water leak on the boiler. Water leak on the system.
H.03 -.00Temporary Fault – Communication error with NTC flue sensor. Sensor not, or badly connected. Bad connection. Sensor fault.
H.03 -.01Temporary Fault – Communication error with the HMI PCB. HMI is not connected.
H.03 -.02Temporary Fault – No flame during operation. No ionisation current.
E.00 – .04Permanent Fault – Return temperature sensor open-circuit. Sensor not or badly connected. Bad connection. Sensor fault.
E.00 – .05Permanent Fault – Return temperature sensor open-circuit. Sensor not or badly connected. Bad connection. Sensor fault.
E.01 – .02Permanent Fault – Temperature measured by return sensor greater than flow sensor. Bad connection. Sensor fault. Sensor not or badly connected.
E.01 – .04Permanent Fault – Loss of flame detected 5 times in 24 hours (Burner on). No ionisation current.
E.01 – .11Permanent Fault Requiring Reset – Incorrect fan speed. External draught over the boiler. Defective gas/air unit.
E.01 – .12Permanent Fault Requiring Reset – Temperature measured by return sensor greater than flow temperature.
E.01 – .17Permanent Fault Requiring Reset – No circulation. Sensor not or badly connected. Sensor fault.
E.01 – .20Permanent Fault – Maximum flue gas temperature value reached (>140 Deg C). No circulation. Sensor fault.
E.02 – .00Permanent Fault – Boiler reset in progress. The reset button has been pressed.
E.02 – .07No or low system water pressure. Low system pressure (less than 0.5bar) boiler will not function.
E.02 – .16Permanent Fault – Onboard CSU time-out. Check PCB for damage.
E.02 – .17Permanent Fault – Permanent loss of communication between the gas valve and boiler PCB. Fault in air/gas unit. Loose connection to the gas valve.
E.02 – .19Permanent Fault – Jumper 1 changed. Check the position of jumper 1.
E.02 – .20Permanent Fault – Jumper 2 changed. Check the position of the jumper 2.
E.02 – .21Permanent Fault – Jumper 3 changed. Check the position of the jumper 3.
E.02 – .47Permanent Fault – Connection to external device unsuccessful. Check to wire to an external device.
E.02 – .48Permanent Fault – Configuration to external device unsuccessful. Check to pair to external.
E.04 – .00Permanent Fault – Gas valve fault. Gas valve not detected.
E.04 – .01Permanent Fault – Flow temperature sensor short-circuited. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .02Permanent Fault – Flow temperature sensor open-circuited. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .03Permanent Fault – Critical flow temperature reached. Non-existent or insufficient circulation.
E.04 – .04Permanent Fault – Flue temperature sensor short-circuited. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .05Permanent Fault – Flue temperature sensor open-circuited. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .06Permanent Fault – Critical flue gas temperature value reached. No circulation. Sensor fault.
E.04 – .08Permanent Fault – Maximum safe temperature value reached. (Safety thermostat open-circuited). No circulation. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .10Failure to light (could be gas supply issue).
E.04 – .12Permanent Fault – False flame signal. Short-term fluctuation of the mains. Ionization current presents even though there is no flame. The burner remains very hot (CO2 too high). Defective gas/air unit.
E.04 – .13Permanent Fault – Fan rotor blocked. Fan seized. Wiring to fan damaged.
E.04 – .17Permanent Fault – Problem with the gas valve. Defective gas/air unit.

BAXI 600 COMBI / BAXI 800 COMBI Boiler Error/Fault Codes

Error CodePossible Fault
H.01 – .00Temporary Fault – Temporary loss of communication between the gas valve and boiler board. Fault in air/gas unit.

Loose connection to the gas valve.

H.01 – .05Temporary Fault – Maximum difference between the flow and return temperature exceeded. Non-existent or insufficient circulation. Sensor error.
H.01 – .08Temporary Fault – Flow temperature increasing too fast in heating mode. Non-existent or insufficient circulation.

Sensor error.

H.01 – .14Temporary Fault – Maximum flow temperature value exceeded. Non-existent or insufficient circulation. Non-existent or insufficient circulation.
H.01 – .18Temporary Fault – No circulation of water. Non-existent or insufficient circulation. Sensor error.
H.01 – .21Temporary Fault – Flow temperature increasing too fast in DHW mode. Non-existent or insufficient circulation. Sensor error.
H.02 – .02Temporary Fault – No input of parameters C1/C2. PCB not configured.
H.02 – .03Temporary Fault- Incorrect configuration settings C1/C2.
H.02 – .04Temporary Fault – Parameter error. Incorrect parameters.
H.02 – .06Temporary Fault – System water pressure. Water leak on the boiler. Water leak on the system.
H.03 -.00Temporary Fault – Communication error with NTC flue sensor. Sensor not, or badly connected. Bad connection. Sensor fault.
H.03 -.01Temporary Fault – Communication error with the HMI PCB. HMI is not connected.
H.03 -.02Temporary Fault – No flame during operation. No ionisation current.
E.00 – .04Permanent Fault – Return temperature sensor open-circuit. Sensor not or badly connected. Bad connection. Sensor fault.
E.00 – .05Permanent Fault – Return temperature sensor open-circuit. Sensor not or badly connected. Bad connection. Sensor fault.
E.01 – .02Permanent Fault – Temperature measured by return sensor greater than flow sensor. Bad connection. Sensor fault. Sensor not or badly connected.
E.01 – .04Permanent Fault – Loss of flame detected 5 times in 24 hours (Burner on). No ionisation current.
E.01 – .11Permanent Fault Requiring Reset – Incorrect fan speed. External draught over the boiler. Defective gas/air unit.
E.01 – .12Permanent Fault Requiring Reset – Temperature measured by return sensor greater than flow temperature.
E.01 – .17Permanent Fault Requiring Reset – No circulation. Sensor not or badly connected. Sensor fault.
E.01 – .20Permanent Fault – Maximum flue gas temperature value reached (>140 Deg C). No circulation. Sensor fault.
E.02 – .00Permanent Fault – Boiler reset in progress. The reset button has been pressed.
E.02 – .07No or low system water pressure. Low system pressure (less than 0.5bar) boiler will not function.
E.02 – .16Permanent Fault – Onboard CSU time-out. Check PCB for damage.
E.02 – .17Permanent Fault – Permanent loss of communication between the gas valve and boiler PCB. Fault in air/gas unit. Loose connection to the gas valve.
E.02 – .19Permanent Fault – Jumper 1 changed. Check the position of jumper 1.
E.02 – .20Permanent Fault – Jumper 2 changed. Check the position of the jumper 2.
E.02 – .21Permanent Fault – Jumper 3 changed. Check the position of the jumper 3.
E.02 – .47Permanent Fault – Connection to external device unsuccessful. Check to wire to an external device.
E.02 – .48Permanent Fault – Configuration to external device unsuccessful. Check to pair to external.
E.04 – .00Permanent Fault – Gas valve fault. Gas valve not detected.
E.04 – .01Permanent Fault – Flow temperature sensor short-circuited. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .02Permanent Fault – Flow temperature sensor open-circuited. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .03Permanent Fault – Critical flow temperature reached. Non-existent or insufficient circulation.
E.04 – .04Permanent Fault – Flue temperature sensor short-circuited. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .05Permanent Fault – Flue temperature sensor open-circuited. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .06Permanent Fault – Critical flue gas temperature value reached. No circulation. Sensor fault.
E.04 – .08Permanent Fault – Maximum safe temperature value reached. (Safety thermostat open-circuited). No circulation. Sensor not or badly connected. Bad connection. Sensor fault.
E.04 – .10Failure to light (could be gas supply issue).
E.04 – .12Permanent Fault – False flame signal. Short-term fluctuation of the mains. Ionization current presents even though there is no flame. The burner remains very hot (CO2 too high). Defective gas/air unit.
E.04 – .13Permanent Fault – Fan rotor blocked. Fan seized. Wiring to fan damaged.
E.04 – .17Permanent Fault – Problem with the gas valve. Defective gas/air unit.

 

Error CodePossible Fault
E09Gas valve connection cable.
E10External probe fault.
E12Differential water flow switch fault (still open).
E13Differential water flow switch fault (still closed).
E15Gas valve command fault.
E20Central heating NTC fault.
E28Flue NTC fault.
E40Central heating return NTC fault.
E50DHW NTC sensor fault (tank boiler) (s.c.) OR DHW NTC sensor fault (tank boiler) (o.c.).
E83/E84/E85/E86/E87No communication.
E109Pre-circulation fault.
E110i) Boiler max temperature exceeded for gradient (probable pump jammed or air in the circuit). OR ii) Boiler max temperature exceeded for overtemperature (probable pump jammed or air in the circuit). OR iii) Safety thermostat sensor tripped.
E118Primary system water pressure too low (< 0.5 bar).
E125Circulation fault (primary).
E128Frequent flame failure (12 times).
E129Safety error for frequent loss of flame with max correction during the ignition during Calibration Function.
E130Flue thermostat sensor tripped (lockout).
E133Failure to light (could be a gas supply issue).
E134Elapsed time gas valve open without gas (short request in a short period)
E135Interruption of gas supply (internal error).
E154Flow/return sensor temperature test.
E160.Fan or fan wiring fault
E163Domestic Hot Water NTC sensor fault (s.c.) OR Domestic Hot Water NTC sensor fault (o.c.).
E270Circulation fault (dry fire).
E317Wrong power supply electrical frequency (Hz).
E321Hot water NTC fault.
E384False flame.
E385Under voltage.
E430Water pressure temporary test.
E430 + Flame ‘crossed’Water pressure test failed.

BAXI 600 HEAT / MAIN ECO COMPACT HEAT Boiler Error/Fault Codes

Error CodePossible Fault
E20Central heating NTC fault
E28Flue NTC fault, air pressure switch fault, blocked flue, blocked condensate, or wiring fault.
E50Hot water NTC fault
E110E110 safety thermostat operated
E119Water pressure switch not operated
E125Circulation fault (primary circuit)
E130Flue NTC operated
E133Interruption of gas supply or flame failure
E160Fan or fan wiring Fault
E193Pre-circulation fault

 

Error CodePossible Fault
1 flash greenMaximum flow temperature exceeded, Flow temperature rise rate too high, Excessive difference between, flow and return temperature
2 flashes greenBL terminals on User Interaction, Controller are open circuit
3 flashes greenNo flame detected during operation
4 flashes greenBad connection or a wiring fault, Internal communication fault
5 flashes greenParameter error or faulty PU, Configuration error or PCB fault
6 flashes greenPossible fault. Internal fault in combustion control unit
1 flash redBad connection to flow or return temperature sensor
2 flashes redOver-temperature thermostat on heat exchanger activated, No water flow through heat exchanger, PCB over-temperature condition, Flue fault resulting in recirculation or activation of air pressure switch (if fitted)
3 flashes redNo ignition, No flame detected following ignition, False flame signal detected
4 flashes redFan calibration error, Fan failure
5 flashes redBad connection to PU, Parameter error or faulty PU
6 flashes redPossible fault. Bad connection or wiring fault, Parameter error

BAXI 600 SYSTEM / BAXI 800 SYSTEM / BAXI 600 LPG Boiler Error/Fault Codes

Error CodePossible Fault
E09Gas valve connection cable
E15Gas valve fault
E20Central heating NTC fault
E28Flue NTC fault
E40Central heating return NTC fault
E83Communication error
E109Pre-circulation fault
E110Safety thermostat operated
E118Primary system water pressure too low
E125Circulation fault (primary)
E128Flame failure
E130Flue NTC operated
E133Interruption of gas supply or flame failure
E135Interruption of gas supply (internal error)
E135Interruption of gas supply (internal error)
E154Flow/ return sensor temperature test
E160Fan or fan wiring fault
E270Circulation fault (Dry fire)
E321Hot water NTC fault
E384False flame

 

Error CodePossible Fault
1 flash greenMaximum flow temperature exceeded, Flow temperature rise rate too high, Excessive difference between, flow and return temperature
2 flashes greenBL terminals on User Interaction, Controller are open circuit
3 flashes greenNo flame detected during operation
4 flashes greenBad connection or a wiring fault, Internal communication fault
5 flashes greenParameter error or faulty PU, Configuration error or PCB fault
6 flashes greenPossible fault. Internal fault in combustion control unit
1 flash redBad connection to flow or return temperature sensor
2 flashes redOver-temperature thermostat on heat exchanger activated, No water flow through heat exchanger, PCB over-temperature condition, Flue fault resulting in recirculation or activation of air pressure switch (if fitted)
3 flashes redNo ignition, No flame detected following ignition, False flame signal detected
4 flashes redFan calibration error, Fan failure
5 flashes redBad connection to PU, Parameter error or faulty PU
6 flashes redPossible fault. Bad connection or wiring fault, Parameter error

BAXI ECOBLUE (COMBI & SYSTEM) Boiler Error/Fault Codes

Error CodePossible Fault
E10Outdoor Sensor Error
E20Central Heating Thermistor Sensor Fault
E28Flue Thermistor Fault
E54HW Flow Sensor Fault
E78Water Pressure Sensor Fault
E100Internal Clock Time Error on PCB
E109Poor Circulation
110Overheat
111Maximum Limit of Flow Temperature
117Water pressure too high
118Water pressure too low
119System Pressure Low (<0.5 bar)
125Water circulation fault
127Legionella Protection Temperature not reached
128Loss of flame during operation
133Safety time to establish flame exceeded
153Forced reset unit unlocked
160Fan Fault
162Air pressure switch error
164Heating flow switch error (Ireland) Pressure Sensor Error (UK)
166Air Pressure Switch Fault
270Dry Fire
432Earth connector error
433Heat exchanger temperature exceeded (greater than 95 degrees)

 

Error CodePossible Fault
1 flash greenMaximum flow temperature exceeded, Flow temperature rise rate too high, Excessive difference between, flow and return temperature
2 flashes greenBL terminals on User Interaction, Controller are open circuit
3 flashes greenNo flame detected during operation
4 flashes greenBad connection or a wiring fault, Internal communication fault
5 flashes greenParameter error or faulty PU, Configuration error or PCB fault
6 flashes greenPossible fault. Internal fault in combustion control unit
1 flash redBad connection to flow or return temperature sensor
2 flashes redOver-temperature thermostat on heat exchanger activated, No water flow through heat exchanger, PCB over-temperature condition, Flue fault resulting in recirculation or activation of air pressure switch (if fitted)
3 flashes redNo ignition, No flame detected following ignition, False flame signal detected
4 flashes redFan calibration error, Fan failure
5 flashes redBad connection to PU, Parameter error or faulty PU
6 flashes redPossible fault. Bad connection or wiring fault, Parameter error

BAXI ECOBLUE (HEAT) Boiler Error/Fault Codes

Error CodePossible Fault
1 Green flashBoiler temp reached
3 Green flashesTemporary Flame Loss
4 Green flashesCommunication error between PCB and Control
5 Green flashesParameter Error On PSU/PCB
6 Green flashesMiscellaneous Error
1 Red flashSensor Error; Sensor Fault, Temperature Fault or Flow Fault
2 Red flashesBoiler overheat tripped
3 Red flashesIgnition fault. Boiler has attempted to light 5 times and failed
4 Red flashesFan Fault
5 Red flashesParameter or PSU Error
6 Red flashesMiscellaneous

BAXI DUO-TEC /MEGAFLO Boiler Error/Fault Codes

Error CodePossible Fault
E10Outdoor sensor error
E20Central Heating Thermistor Sensor Fault
E28Flue Thermistor Fault
E110Boiler Overheat. Ensure radiators are bled of air
E119Low water pressure. Add water to the system via filling loop
E125Primary Water Circulation Fault. Ensure radiators are bled of air
E131Flue overheat lockout. This may follow a power cut, try reset
E133Ignition fault – Check gas is turned on if prepayment meter checks there is credit. If all ok and E133 persists – contact Engineer to visit & investigate
E160/E161Fan Fault
E164Fan Fault
E167PCB Fault
E168PCB lock out
E193Circulation fault

BAXI SOLO (HEAT) Boiler Error/Fault Codes

Error CodePossible Fault
Flash Flash OnFan Fault
Flash Off FlashIncoming Voltage less than 180V
Flash Off OnOverheat lockout
Flash On FlashPCB fault
Flash On OnPCB fault
Off Off OffNo power supply
On Flash FlashNo circulation/dry fire
On Flash OnThermistor fault
On Off flashLive and neutral reversed
On Off OnIgnition lockout
On Off FlashPCB fault
On Off FlashLow voltage wiring harness fault

BAXI GA RANGE Boiler Error/Fault Codes

Error CodePossible Fault
E4Ignition failure
E09Gas valve wiring fault
E10Outdoor sensor error
E15Gas valve connection fault
E20Central heating thermistor sensor fault
E28Flue thermistor fault
E40Central heating return thermistor fault
E53Flue obstruction
E55Calibration required
E78Water pressure sensor fault
E92Combustion test alarm during auto-setting
E109Poor circulation
E110Boiler overheat tripped
E117System pressure high (>2.9 Bar)
E118System pressure low (< 0.5bar)
E125Primary water circulation fault
E128Loss of flame during operation
E129Loss of flame during calibration
E133Ignition fault
E135Internal error
E154Primary flow fault
E160Fan fault
E270Dry fire
E317Wrong power supply (Hz)
E321Not water thermistor fault
E384Flame detected when gas valve off
E385Low voltage (less than 195v)

BAXI AVANTA RANGE Boiler Error/Fault Codes

Error CodePossible Fault
E0Temperature sensor fault
E1Boiler overheat tripped
E2Poor circulation
E3PCB fault
E4Ignition failure
E10Poor/No circulation
E12PCB Fault
E13Heat exchanger thermal fuse tripped
E83/84/85/86/87Fan fault normally E8

BAXI MAIN ECO COMPACT HEAT Boiler Error/Fault Codes

Error CodePossible Fault
1 Green FlashBoiler temp reached
3 Green FlashesBoiler temp reached.Temporary error, self-reset, if continues will go to 3 red flashes
3 Green FlashesTemporary Flame Loss. Temporary error, self-reset, if continues will go to 3 red flashes
4 Green FlashesCommunication error between PCB and Control. Temporary error, self-reset.
5 Green FlashesParameter Error On PSU/PCB. Temporary error, self-reset.
6 Green FlashesMiscellaneous Error. Temporary error, self-reset.
1 Red FlashSensor Error; Sensor Fault, Temperature Fault or Flow Fault
2 Red FlashesBoiler overheat tripped
3 Red FlashesIgnition fault. The boiler has attempted to light 5 times and failed
4 Red FlashesFan Fault
5 Red FlashesParameter or PSU Error
6 Red FlashesMiscellaneous

Baxi Boiler 110 Error Code

Your boiler has become too hot to handle.

Suggestion

Firstly, attempt to bleed your radiators. This merely implies that any trapped air in the radiator is being released. Air in your heating system not only makes your entire system inefficient, but it can also prevent the boiler from doing its job and cause it to overheat.

This is less likely to be an issue in more modern homes with underfloor heating, but it can still happen.

Baxi Boiler E133/E28 Error Code

It wouldn’t surprise us if you saw error codes E133 or E28 during the cold months. Baxi boilers (and most other types) use condensate lines to transfer wastewater away from the boiler and onto a drain outside.

This is an important aspect of your boiler’s day-to-day operation since it prevents water from damaging the boiler’s mechanics. However, when it becomes cold outdoors, the drain and condensate pipes can freeze!

Suggestion

Pour warm water safely over the frozen pipes outside your home or give one of our Gas Safe qualified engineers a call if you’re not sure where the pipes are or want a second view.

Baxi Boiler E199 Error Code – Low Boiler Pressure

Your water pressure is low, as indicated by this problem number. A Baxi’s regular water pressure ranges from 1.0 to 2.0 bar.

Suggestion

If the water pressure is less than 1.0 bar, you may need to check your gauge. Boilers frequently need to be repressurized, and in most situations, this is something you can do yourself. Rigid filling loops, flexible filling loops, or an Easy-Fill permanent filling connection are all options.

How to Reset a Baxi Boiler?

Depending on its type, there are three different ways to reset a Baxi boiler. Baxi boilers come in various models, including those with a reset button, a thermostat control knob, or an ON/OFF/SELECTOR switch. Understanding your specific model is crucial for a successful reset.

Restarting a Baxi Boiler with a reset button:

To restart the boiler, press the reset button and wait until the red light disappears. Once the boiler starts, the burner light will come up, indicating that it has fired up. If it does not fire up and instead suggests a fault code, remember that a certified engineer is always available to provide professional assistance.

Restarting a Baxi Boiler with a thermostat control knob:

When your Baxi Boiler flashes a red lockout light, you have to reset it. Turn your thermostat knob anticlockwise and hold it till the red-light stops flashing. Once the red light is gone, change the thermostat knob’s direction to your preferred settings, and you’ve successfully reset your boiler.

Restarting your boiler with an ON/OFF/SELECTOR switch:

To access the boiler’s control panel, open the pull-down panel to view the controls. If the boiler encounters a fault, an error message or light may appear on the display, depending on the model. For example, error code E133 indicates an issue related to the gas supply, ignition, or a blocked condensate.

If your boiler uses neon indicator lights instead of an LED display, the top left light on a 10-neon display usually signals a flame failure. Regardless of the display type, the boiler can be reset similarly.

Turn the selector switch to the “R” (Reset) position, hold for 5 seconds, and release. The error code will then disappear and be replaced by the current temperature. On models with neon indicators, the flame failure light will stop blinking and be replaced by the burner light.

After a few seconds, the orange burner light should come on, indicating the burner has reignited, and the temperature will rise. If the boiler continues to lock out, you should contact your installer or a service engineer to investigate further.

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Final Words

After reading the above error codes, I hope you can now detect the problem and take action. However, no worries if the problem persists or you struggle to identify and understand the code! Contact us, and one of our representatives will guide you on the phone and assist you with your problem.

FAQ'S

What is the Baxi boiler error code e1?

This is a less common boiler fault number, but if it appears, it signifies your boiler’s pressure has dropped and a water leak is preventing your system from working properly. In this situation, you’ll need to repressurize your system to resolve the issue.

What is the Baxi boiler e119 error code?

In most circumstances, an E119 fault on a Baxi boiler implies that there is water leaking somewhere in the system, which is a job best left to the pros; leaks can be difficult to locate and repair and may require specialized understanding.

What is the Baxi boiler e118 error code?

Low water pressure is usually indicated by the code E118. If you check at your gauge, you’ll notice that it’s down to zero on this gauge.

What is the Baxi boiler e168 fault code?

When the boiler detects a problem but is unable to determine what it is, the error code E168 is displayed. This can happen if the boiler has reset after a malfunction has occurred, or if there has been an external issue affecting the boiler, such as a power outage.

What is the Baxi boiler fault code e160?

A fan failure on a Baxi boiler with an error number of e160 could be a seized or burnt-out fan, or even the fan harness wire; verify with your installer if your boiler is still under warranty. To diagnose the problem, BoilerOne recommends consulting a gas safe qualified engineer.

Posted by: Martin Astley 23 March 2022