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Expert Baxi Boiler Repairs & Installations

Boiler Repairs Experts: Your Trusted Source for Baxi Boilers

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Emergency Boiler Repairs

Our team of experts are on hand 24/7 to help you with any emergency boiler repairs. We understand that boiler breakdowns can be disruptive and stressful, which is why we provide fast and reliable repair services to get your Baxi Boilers up and running as soon as possible.

Boiler Service

Regular servicing is essential to keep your Baxi Boilers running efficiently, so our team of experts can provide comprehensive services to keep your boilers in top condition. This includes checking the performance of your system, fault finding, and ensuring that all safety requirements are met.

New Boilers Installations

If you need a new Baxi boiler, our experienced technicians can help you choose the right system for your home or business. We will ensure that your new boiler is installed properly, making sure that all safety regulations and requirements are met. We can also provide advice on the best features for your particular needs.

Keep Your Baxi Boiler Running with Boiler Repairs Experts London

Professional Boiler Repairs and Maintenance

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Reliable Service

At Boiler Repairs Experts London, our team of experienced Baxi boiler engineers are on hand to ensure your heating system is running reliably. We have years of experience in the installation, repair, and maintenance of Baxi boilers. So, you can rest assured that when you come to us, you can trust that we have the knowledge and experience to get the job done right.

Fixed Price Repairs

At Boiler Repairs Experts London, we strive to provide our customers with a transparent service that won’t break the bank. That’s why we offer fixed price repairs for Baxi boilers. No matter the issue, our team of experts can diagnose and repair your Baxi boiler quickly and efficiently, giving you peace of mind that your boiler will be running again in no time.

Regular Maintenance

Like all boilers, your Baxi boiler needs to be serviced regularly to ensure it works as efficiently as possible. Boiler R offers regular maintenance services designed to extend the life of your Baxi boiler. Our expert engineers can help diagnose any issues before they become a major problem, allowing you to get the most out of your heating system.

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  • I used this company twice now,always on time,and have done a great job,quite affordable too. Well recommended

    JAMES BEATIE

  • Absolute life savers! My boiler was leaking and a bunch of other things were happening. They offered to buy and fit a tap in for free, they also put in my washing machine for free when curry's didn't know how install it. I would 100% use them again! They also called up a plumber for me to sort out my pipes. Couldn't recommend them enough.

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Baxi boiler errors and fault codes

BAXI 200 COMBI / BAXI 400 COMBI
600 COMBI / BAXI 800 COMBI
600 HEAT / MAIN ECO COMPACT
600 SYSTEM / BAXI 800 SYSTEM / BAXI 600 LPG
BAXI ECOBLUE
ECOBLUE (HEAT) Boiler

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

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

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

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

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

Error Code Possible Fault
E20 Central heating NTC fault
E28 Flue NTC fault, air pressure switch fault, blocked flue, blocked condensate, or wiring fault.
E50 Hot water NTC fault
E110 E110 safety thermostat operated
E119 Water pressure switch not operated
E125 Circulation fault (primary circuit)
E130 Flue NTC operated
E133 Interruption of gas supply or flame failure
E160 Fan or fan wiring Fault
E193 Pre-circulation fault

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

Error Code Possible Fault
E09 Gas valve connection cable
E15 Gas valve fault
E20 Central heating NTC fault
E28 Flue NTC fault
E40 Central heating return NTC fault
E83 Communication error
E109 Pre-circulation fault
E110 Safety thermostat operated
E118 Primary system water pressure too low
E125 Circulation fault (primary)
E128 Flame failure
E130 Flue NTC operated
E133 Interruption of gas supply or flame failure
E135 Interruption of gas supply (internal error)
E135 Interruption of gas supply (internal error)
E154 Flow/ return sensor temperature test
E160 Fan or fan wiring fault
E270 Circulation fault (Dry fire)
E321 Hot water NTC fault
E384 False flame

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

Error Code Possible Fault
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
111 Maximum Limit of Flow Temperature
117 Water pressure too high
118 Water pressure too low
119 System Pressure Low (<0.5 bar)
125 Water circulation fault
284 The gas valve is switched
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)

BAXI ECOBLUE (HEAT) Boiler Error/Fault Codes

Error Code Possible Fault
1 Green flash Boiler temp reached
3 Green flashes Temporary Flame Loss
4 Green flashes Communication error between PCB and Control
5 Green flashes Parameter Error On PSU/PCB
6 Green flashes 6 Green flashes
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
BAXI DUO-TEC /MEGAFLO
BAXI SOLO (HEAT)
GA RANGE Boiler

BAXI DUO-TEC /MEGAFLO Boiler Error/Fault Codes

Error Code System Behavior
E10 Outdoor sensor error
E20 Central Heating Thermistor Sensor Fault
E28 Flue Thermistor Fault
E110 Boiler Overheat. Ensure radiators are bled of air
E119 Low water pressure. Add water to the system via filling loop
E125 Primary Water Circulation Fault. Ensure radiators are bled of air
E131 Flue overheat lockout. This may follow a power cut, try reset
E133 Ignition 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/E161 Fan Fault
E164 Fan Fault
Fan Fault PCB Fault
E168 PCB lock out

BAXI SOLO (HEAT) Boiler Error/Fault Codes

Error Code System Behavior
Flash Flash On Fan Fault
Flash Off Flash Incoming Voltage less than 180V
Flash Off On Overheat lockout
Flash On Flash PCB fault
Flash On On PCB fault
Off Off Off No power supply
On Flash Flash No circulation/dry fire
On Flash On Thermistor fault
On Off flash Live and neutral reversed
On Off On Ignition lockout
On Off Flash PCB fault
On Off Flash Low voltage wiring harness fault

BAXI GA RANGE Boiler Error/Fault Codes

Error Code System Behavior
E4 Ignition failure
E09 Gas valve wiring fault
E10 Outdoor sensor error
E15 Gas valve connection fault
Gas valve connection fault Central heating thermistor sensor fault
E28 Flue thermistor fault
E40 Central heating return thermistor fault
E53 Flue obstruction
E55 Calibration required
E78 Water pressure sensor fault
E92 Combustion test alarm during auto-setting
E109 Poor circulation
E110 Boiler overheat tripped
E117 System 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 Dry fire
E317 Wrong power supply (Hz)
E321 Not water thermistor fault
E384 Flame detected when gas valve off
E385 Low voltage (less than 195v)

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