Baxi Boiler Repairs

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Baxi Boiler Repairs London

Gas Safe registered engineers • 24/7 call handling • London wide

Call Now: 0203 868 6251

Tell us the fault code and model. We will advise the safest next step.

Common Baxi models we repair include EcoBlue, Duo-tec, Platinum, and Neta-tec, with frequent calls for codes E133, E119, E125, and E110.

We fix Baxi boiler fault codes, no heating, no hot water, lockout, leaking, and low pressure across London.

We also offer boiler servicing and boiler installation across London.

Quick Navigation

• Safety First
• Quick Checks Before You Call
• Fault Code Table
• Most Searched Problems
• Why Baxi Boilers Fail
• Models We Repair
• Repair or Replace

Safety First

Smell gas? Turn off the gas supply at the meter if it is safe to do so. Open windows. Leave the property. Call the National Gas Emergency Service on 0800 111 999. Do not use switches, and do not use naked flames.

CO alarm sounding? Open windows immediately. Leave the property. Call 999. Do not re-enter until cleared by emergency services.

Boiler leaking heavily? Turn off the boiler at the controls. If safe, turn off the water supply. Call an engineer.

Quick Checks Before You Call

Before calling an engineer, these safe checks may resolve simple issues with your Baxi boiler.

Check the gas supply
Is gas working at other appliances in your home? If not, check your meter and any prepayment credit.

Check the pressure gauge
Pressure should read around 1.0 to 1.5 bar when cold. If below 1 bar, you may need to repressurise using the filling loop.

Check the thermostat
Is the room thermostat set above current room temperature? Are the batteries working?

Check the timer or programmer
Is the heating scheduled to be on? Check the clock is set correctly.

Try a single reset
Locate the reset button on your Baxi boiler. Press once and wait. If the fault returns, do not keep resetting. Call an engineer.

Check the condensate pipe
In cold weather, the external condensate pipe can freeze. Look for a white plastic pipe exiting through an outside wall. If frozen, pour warm water over it gently.

Baxi Fault Codes

Note: Baxi fault codes can vary slightly by model and generation. If your exact code is not listed, call us with the code and model and we will advise the safest next step.

Common Baxi fault codes and what to do

Most Searched Baxi Problems

If you are seeing a lockout, loss of hot water, or your Baxi boiler keeps resetting, tell us the fault code and model and we will confirm the safest next step.

E133 – ignition failure

E133 is the most common Baxi fault code. The boiler tries to ignite but no flame is established. Common causes include gas supply issues, a faulty ignition electrode, or a blocked condensate pipe in winter. Check gas is on elsewhere in the home. Try one reset. If the lockout returns, stop and call an engineer.

E119 – low pressure

If your Baxi shows E119, system pressure has dropped below the minimum threshold. Top up via the filling loop to around 1.0 to 1.5 bar when cold. If pressure drops again within days, there may be a leak in the system or a failing expansion vessel. Call an engineer to find the cause.

E125 – circulation fault

E125 indicates the boiler has detected poor or no flow through the system. Check your radiators are heating evenly. If circulation seems poor, there may be a pump issue, airlock, or sludge buildup. Call an engineer to diagnose and repair.

No hot water but heating works

On Baxi combi boilers, you may get heating but no hot water, or the reverse. This often points to a diverter valve issue. The diverter valve directs hot water between taps and radiators. When it wears or sticks, hot water delivery becomes unreliable. Call an engineer for diagnosis.

Why Baxi Boilers Develop Faults

Baxi is one of the largest boiler manufacturers in the UK. Here is what we commonly see.

Ignition electrode wear

Ignition faults (E133) can occur when the ignition electrode wears or becomes coated with carbon. Condensate blockages in winter can also contribute to repeated lockouts.

Low pressure and expansion vessel faults (E119)

Low pressure faults often point to a failing expansion vessel or a weeping pressure relief valve. The expansion vessel absorbs pressure changes as water heats and cools. If the diaphragm fails or the air charge is lost, pressure drops can occur.

Circulation and pump issues (E125)

E125 can indicate poor circulation through the system. This may be caused by a failing pump, sludge buildup, or closed radiator valves. A powerflush may help restore flow.

Overheat protection (E110)

E110 indicates the boiler has overheated. This can be caused by poor circulation, a blocked heat exchanger, or a faulty thermostat. Do not keep resetting.

Diverter valve on combi boilers

The diverter valve directs hot water between your taps and radiators. When it wears or sticks, you may get heating but no hot water, or the reverse.

Baxi Models We Repair

We repair Baxi combi, system, and regular boilers in London, including:

EcoBlue range: EcoBlue 24, EcoBlue 28, EcoBlue 33, EcoBlue Advance, EcoBlue Plus
Duo-tec range: Duo-tec 24, Duo-tec 28, Duo-tec 33, Duo-tec 40
Platinum range: Platinum 24, Platinum 28, Platinum 33, Platinum 40
Neta-tec range: Neta-tec 24GA, Neta-tec 28GA, Neta-tec 33GA
Other models: 600, 800, Megaflo, and older Baxi units

Baxi parts are widely available as a major UK manufacturer. We check availability before attending and advise honestly if repair is not viable or cost effective.

Repair or Replace Your Baxi Boiler?

We help you decide based on age, reliability, and parts availability.

Repair makes sense when

• Boiler is under 10 years old
• This is the first major fault
• Parts are readily available
• Boiler has been regularly serviced

Replacement may be better when

• Boiler is 12 to 15 years old or more
• You have had multiple breakdowns recently
• Parts are obsolete or hard to source
• The boiler is undersized for the property
• Energy bills are higher than expected for the property size

Our engineers give honest assessments. We focus on safety and reliability, not pushing unnecessary replacements.

Baxi Boiler Servicing

Annual servicing reduces breakdown risk and keeps your Baxi boiler running efficiently. See Boiler servicing London.

Landlords and Letting Agents

We provide boiler repairs and gas safety certification for landlords across London. See Landlord gas safety certificate (CP12).

Baxi Repairs Across London

London wide coverage for Baxi boiler repairs. Book an engineer or view our London areas we cover.

Have your postcode and fault code ready and we will confirm the quickest appointment slot.

Other Boiler Brands We Repair

Worcester • Vaillant • Ideal • Glow-worm • Viessmann • Potterton • Main • Vokera • Alpha • Ferroli

View all brands

Baxi Boiler Repair FAQs

How quickly can you attend for a Baxi breakdown?

We offer same day attendance where slots are available. For no heating or hot water, we prioritise urgent breakdowns. Call our 24/7 line and we will advise availability.

Do you carry Baxi parts?

We stock common Baxi parts including diverter valves, ignition electrodes, pressure sensors, fans, and PCBs. Baxi parts are widely available.

Is it safe to reset my Baxi boiler?

Try one reset. If the fault returns after resetting, stop and call an engineer. Do not keep resetting, especially for E110 overheat faults.

How much does a Baxi boiler repair cost?

Costs vary depending on the fault and parts required. We diagnose first and quote before any repair work begins.

Related Services

• Emergency boiler repairs
• Boiler servicing London
• Boiler installation London
• Power flush London
• Landlord gas safety certificate (CP12)
• London areas we cover

Speak to Our Team

For safe next steps, call now.

Call 0203 868 6251 | Book an Engineer

Gas Safe registered • 24/7 call handling • Quote before work