Glow Worm Boiler Repairs London
Over 20+ years experience with Glow Worm Boilers
Insurance approved
90% repaired on the same day
0203 695 3137
How we can assist with your Glow Worm Boilers
- Emergency Boiler Repairs
- Boiler Service
- Landlord Safety Certificates
- New Boilers Installations
- Leaking & Noisy Boilers
- Power Flushes
Boiler Repairs R Us are experienced in handling all types of Glow Worm Boilers. We can also assist with all gas, condensing, combi boiler installations and upgrades. All our plumbers are Gas Safe Registered so you can be assured all our work is carried out within the required regulations. So for complete customer satisfaction call us on 0203 695 3137 to get your Glow Worm Boilers repaired today!
Join 1,000’s of happy customers in London!
Trusted, reliable boilers repair & install specialists.
Get pricing and book repairGlow Worm Boilers and Boiler Repairs R Us
At Boiler Repairs R Us, we take pride in our team of highly skilled tradesmen, all of whom have extensive experience handling Glow Worm boiler issues. If you notice warning signs such as unusual noises or inconsistent heating, a single call to us is all it takes to get it resolved.
We provide comprehensive Glow Worm boiler services, including installations, repairs, and routine maintenance, ensuring that your Glow Worm boiler requires minimal intervention to maintain optimal performance. Our engineers arrive promptly, equipped with the right tools to restore your boiler to optimal performance.
With fixed-rate pricing and no hidden fees, you stay in full control of your repair costs—ensuring transparent, affordable, and reliable service every time.
Regular servicing is crucial to ensure the optimal performance and safety of your Glow Worm heating system, especially during extreme weather conditions. Glow Worm and Boiler Repairs R Us: a great combination for a reliable hot water system.
Emergency Glow Worm Boiler Repair
At Boiler Repairs R Us, we understand that boiler breakdowns can happen at any time, which is why we offer emergency Glow Worm boiler repairs. Our team of expert heating engineers is available 24/7 to respond to your emergency repair needs. We’ll work quickly and efficiently to diagnose and fix the problem, getting your heating system up and running in no time. Our emergency repair service is available to domestic and commercial customers in London and the surrounding areas.
5 great reasons to choose Boiler Repairs R Us to fix your Glow Worm
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Incredible speed: We specialise in getting your Glow Worm boiler up and running at full pelt without delay. Our massive, London-wide network of specialists covers every corner of the capital. That means we can have somebody at your door ASAP, regardless of when and where you need us. Our commitment to fast response time is reflected in our 90% record of same day repairs.
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Why Trust Boiler Repairs R Us for Your Glow Worm Boiler?
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Extensive Industry Experience
With over 20 years of hands-on expertise working with Glow Worm boilers, our highly trained heating engineers can quickly identify and resolve any issue. They come fully equipped with the necessary tools and knowledge to restore your heating system efficiently -
Top-Quality Service at Affordable Rates
We take pride in offering specialist Glow Worm boiler repair services in London at some of the most competitive prices available. Our pricing is clear and upfront, so you always remain in full control of your repair costs. -
Professional & Friendly Service
While we focus on delivering fast and high-quality repairs, we also ensure every interaction is polite, professional, and customer-friendly, making your experience as smooth as possible. -
Versatile Expertise
Our skills extend beyond just repairing Glow Worm boilers—we can handle a variety of services related to these products, ensuring your heating system operates efficiently year-round.If you are looking to install a new system or upgrade your current model, we can do it for you, including new boiler installation.
About Our Service
At Boiler Repairs R Us, we pride ourselves on providing top-notch Glow Worm boiler services to domestic and commercial customers in London and the surrounding areas. Our team of expert heating engineers is dedicated to delivering exceptional service, ensuring that your Glow Worm boiler is running efficiently and safely. We offer a range of services, including boiler installation, repair, and servicing, as well as emergency repairs for those unexpected breakdowns. Our goal is to provide you with peace of mind, knowing that your heating system is in good hands.
How we can assist with your Glow Worm Boiler
Our team of expert boiler engineers specializes in handling Glow Worm boiler installations, repairs, and servicing. Their expertise ensures the proper functioning of heating systems in both domestic and commercial properties.
Regular boiler service is crucial to maintain the functionality and efficiency of Glow Worm boilers. Look out for signs such as unusual sounds and rising energy bills, which may indicate that your Glow Worm boiler requires servicing. Rely on our thorough servicing to prevent breakdowns and enhance energy efficiency.
We are always ready to handle emergency repairs for Glow Worm boilers, ensuring swift response times and reliable heating solutions. Our commitment to safety and efficiency means you can trust us for all your urgent heating needs.
Our company prides itself on being fully accredited installers of domestic and commercial boilers. We offer comprehensive services that include installation, servicing, and repairs for various boiler systems. Whether you have a new build property or an existing system, our team is equipped to handle all your boiler needs with expertise and professionalism.
We also provide a fixed price repair service, ensuring transparent and predictable pricing for all our repair services. This means you can rely on us for convenient and affordable repair options, making it easier to find a local provider you can trust.
The Glow Worm Brand
For nearly 100 years, Glow Worm has been a well-recognized and trusted name in the UK’s boiler industry. Always ahead of the curve, the company consistently leads the way in adopting new advancements in hot water and heating technology.
During the 1990s, Glow Worm pioneered one of the world’s first condensing boilers, a system that is now widely used across homes and businesses throughout Europe. This innovative approach and commitment to progress earned Glow Worm a “Best Buy” award from Which?, one of the UK’s leading consumer review organizations.
Another key factor behind Glow Worm’s long-standing success is its affordability. These boilers not only deliver reliable performance but are also designed to be cost-effective, ensuring energy efficiency that helps homeowners keep heating costs under control.
Choosing a Glow Worm boiler means investing in a product backed by decades of expertise and a reputation for cutting-edge design and world-class manufacturing.Alongside its range of gas boilers, Glow Worm offers renewable energy solutions, hot water cylinders, and intelligent home heating controls, all complemented by exceptional after-sales support across the UK.
Kevin and his team fitted my new boiler and 2 rads in a couple of days. Great price and service.Michelle – Barnet, LondonPunctual work carried out to a very high standard and very reliable and easy to communicate with. WIll recommend to my friendsJason – Croydon, Surrey
Glow Worm Boiler Installation
At Boiler Repairs R Us, we specialize in Glow Worm boiler installations, providing our customers with efficient and reliable heating solutions. Our team of Gas Safe registered engineers has extensive experience in installing Glow Worm boilers, ensuring that every installation is carried out to the highest standards. We offer a range of Glow Worm boiler models to suit different needs and budgets, and our engineers will work with you to determine the best option for your property.
Our Glow Worm boiler installation services include:
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Free quotes and assessments
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Expert installation by Gas Safe registered engineers
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A range of Glow Worm boiler models to choose from
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Competitive pricing and flexible payment options
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A comprehensive warranty on all installations
Choosing Boiler Repairs R Us for your Glow Worm boiler installation means you can enjoy peace of mind knowing that your heating system is in expert hands. We are committed to providing top-notch service and ensuring your home stays warm and comfortable.
Glow Worm Boiler Maintenance
Regular maintenance is essential to ensure that your Glow Worm boiler runs efficiently and effectively. At Boiler Repairs R Us, we offer a range of maintenance services to keep your boiler in top condition. Our team of experienced engineers will carry out a thorough inspection of your boiler, identifying any potential issues before they become major problems.
Our Glow Worm boiler maintenance services include:
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Annual boiler servicing
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Boiler inspections and diagnostics
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Cleaning and replacement of parts as needed, ensuring that your Glow Worm boiler requires minimal intervention to maintain peak efficiency
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Advice on how to maintain your boiler and prevent breakdowns
By scheduling regular maintenance with us, you can extend the lifespan of your Glow Worm boiler and ensure it operates at peak efficiency, saving you money on energy bills and avoiding unexpected breakdowns.
Our Accreditations
We are proud to be a fully accredited Glow Worm boiler installer and repair service. Our team of heating engineers is Gas Safe registered, ensuring that all work is carried out to the highest standards of safety and quality. We are also accredited by OFTEC and Which? Trusted Trader, giving you added peace of mind when choosing our services. Our commitment to excellence has earned us a reputation as one of the top Glow Worm boiler service providers in London.
Signs Your Glow Worm Boiler Needs a Service
It’s essential to recognize the signs that your Glow Worm boiler requires a service to avoid breakdowns and ensure optimal performance. Here are some common signs that your boiler requires attention:
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Unusual noises or leaks from the boiler
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Reduced boiler efficiency or increased energy bills
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Faulty or malfunctioning controls
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Age of the boiler (most boilers require replacement every 10-15 years)
If you notice any of these signs, it’s essential to contact a qualified engineer to assess and service your boiler. Timely maintenance can prevent minor issues from turning into major problems, ensuring your heating system remains reliable and efficient.
Emergency Glow Worm Boiler Repairs
At Boiler Repairs R Us, we understand that boiler breakdowns can happen at any time, which is why we offer emergency Glow Worm boiler repairs. Our team of expert heating engineers is available 24/7 to respond to your emergency repair needs. We’ll work quickly and efficiently to diagnose and fix the problem, getting your heating system up and running in no time. Our emergency repair service is available to domestic and commercial customers in London and the surrounding areas.
Why Choose Us?
For nearly a 30 years, Boiler Repairs R Us has been a household name and one of the most trusted boiler brands in the UK. Known for embracing technological advancements, Glow Worm has consistently been at the forefront of innovation in hot water and heating systems.
During the 1990s, Glow Worm was among the first manufacturers to develop condensing boilers, a breakthrough that has since become widely adopted across Europe. This forward-thinking approach and dedication to innovation earned the brand a “Best Buy” award from Which?, a leading consumer advocacy organization.
A major factor in Glow Worm’s ongoing success is its affordability. These boilers not only offer dependable performance but also feature cost-efficient technology that helps homeowners reduce energy expenses while keeping their homes warm and comfortable.
When you choose a Glow Worm boiler, you’re investing in a product backed by 75 years of expert engineering and industry-leading design. In addition to gas boilers, Glow Worm offers renewable energy solutions, hot water cylinders, and advanced domestic controls, all backed by one of the most reliable after-sales support services in the UK.
Kevin and his team fitted my new boiler and 2 rads in a couple of days. Great price and service.Michelle – Barnet, London
Punctual work carried out to a very high standard and very reliable and easy to communicate with. WIll recommend to my friendsJason – Croydon, Surrey
Glow Worm Boiler Models We Service and Repair
Current Models:
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Betacom Series:
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Betacom 24C: A compact combination boiler offering efficient heating and hot water solutions.
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Betacom 30C: Provides higher output for larger heating demands.
Note: The Betacom series features user-friendly controls and reliable performance.
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Flexicom Series:
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Flexicom 24HX: A high-efficiency combi boiler with a 24 kW output.
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Flexicom 30HX: Offers a 30 kW output, suitable for larger homes.
Note: Flexicom boilers are known for their compact design and advanced features.
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Ultracom Series:
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Ultracom 24HXi: A high-efficiency system boiler with a 24 kW output.
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Ultracom 30HXi: Provides a 30 kW output for substantial heating needs.
Note: Ultracom boilers are recognized for their efficiency and reliability.
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Xtrafast Series:
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Xtrafast 30: A combination boiler offering quick heating response times.
Note: Xtrafast models are designed for rapid heating performance.
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Compact Series:
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Compact 24: A space-saving combi boiler suitable for smaller properties.
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Compact 30: Offers a higher output for medium-sized homes.
Note: Compact boilers are ideal for properties with limited space.
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Ci Series:
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Ci 30: A combination boiler with a 30 kW output, providing efficient heating and hot water.
Note: Ci models are designed for ease of installation and maintenance.
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Past Models:
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Betacom A Series:
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Betacom A 24C: An earlier model offering reliable heating solutions.
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Betacom A 30C: Provided efficient heating for medium to large homes.
Note: The Betacom A series has been succeeded by the latest Betacom models with enhanced features.
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Flexicom A Series:
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Flexicom A 24HX: An earlier version of the Flexicom 24HX.
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Flexicom A 30HX: Preceded the current Flexicom 30HX model.
Note: The Flexicom A series has been updated to improve efficiency and performance.
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Ultracom A Series:
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Ultracom A 24HXi: An earlier iteration of the Ultracom 24HXi.
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Ultracom A 30HXi: Preceded the current Ultracom 30HXi model.
Note: The Ultracom A series has been upgraded to meet modern heating demands.
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Areas we Cover in London
| EC district:
EC1A EC1M EC1N EC1P EC1R EC1V EC1Y : Barbican, Clerkenwell, Finsbury WC district: WC1A WC1B WC1E WC1H WC1N WC1R WC1V WC1X: Bloomsbury, Gray’s Inn E district E1: Mile End, Stepney, Whitechapel N district N1: Barnsbury, Canonbury, Islington NW district NW1: Camden Town, Regent’s Park |
SE district
SE1: Bermondsey, Borough, Southwark, Waterloo SW district SW1: Belgravia, Pimlico, Westminster W district W1: Marylebone, Mayfair, Soho Outer London BR: Bromley |
Glow Worm Combi Boiler Problems
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Glow-worm Boiler Repair Help Centre
Common Glow-worm faults, fault codes, safe checks, and when to call a Gas Safe engineer.
⚠️ Safety First
Smell gas? Do not touch anything. Do not use switches. Open windows, leave the property, and call the National Gas Emergency Line: 0800 111 999.
Carbon monoxide alarm sounding? Get everyone out immediately and call 999. Learn more about carbon monoxide safety.
No gas smell, no alarm? Your boiler may have locked out as a safety precaution. Try the quick checks below.
Jump to: Fault Codes · F75 Fault · Pressure · Frozen Condensate · Repair or Replace
Quick Checks Before You Call Anyone
These take 60 seconds and solve a surprising number of lockouts:
- Check the pressure gauge: If below 1 bar, top up (see guide below). More detail in our complete pressure guide.
- Note the fault code: Glow-worm displays show F codes like F28, F75, F22. Write it down before calling.
- Check your fuse box: Boilers need electricity; a tripped switch is an easy fix.
- Check thermostat and timer: Settings can change after clock changes or dead batteries.
- Freezing weather? The condensate pipe may be frozen (see winter section below).
- Reset once only: Press the reset button on the front panel, wait 60 seconds. If it locks out again, stop and call an engineer.
Glow-worm Fault Codes
Note: Glow-worm is part of the Vaillant Group, so many fault codes are similar to Vaillant. Code meanings can vary slightly between model ranges. If unsure, call us and we will help you identify your specific code.
| Code | What It Means | What To Do |
|---|---|---|
| F28 | Ignition failure (no flame established) | Check gas supply and other appliances. Check condensate pipe in freezing weather. If still locked out, call engineer. |
| F29 | Flame lost during operation | Reset once. If it happens again, call engineer. |
| F75 | Pump or pressure sensor fault | Check pressure gauge. If pressure is fine, call engineer. |
| F22 | Low water pressure | Top up pressure using filling loop (see below). If it drops again within days, call engineer. |
| F27 | Flame detected when there should be none | Call engineer immediately. Do not reset. |
| F32 | Fan fault | Call engineer. |
| F33 | Flue gas sensor fault | Call engineer. |
| F62 | Gas valve fault | Call engineer. |
| F63 | EEPROM fault (PCB memory) | Call engineer. |
F28: Ignition Failure
What is happening: The boiler is trying to ignite but cannot establish a flame after multiple attempts.
Common causes: Frozen condensate pipe (winter), gas supply interruption, faulty ignition electrode, blocked or damaged flue, gas valve fault.
What to try: Check if your gas hob or other gas appliances work. In freezing weather, check the condensate pipe for ice. If gas supply is fine but boiler will not ignite, call an engineer.
F75: Pump or Pressure Sensor Fault
What is happening: The boiler cannot detect a pressure change when the pump runs. This is one of the most common Glow-worm faults, shared with Vaillant boilers.
Common causes: Often linked to pump performance, pressure sensor issues, air or debris in the hydraulic block, or system conditions. Hard water and older systems can contribute to debris and restriction over time.
What to try: Check the pressure gauge first. If pressure is below 1 bar, top up and reset. If pressure is fine but F75 persists, the pump or sensor likely needs attention. Call an engineer.
Note: F75 is common on older Glow-worm models. It often requires pump replacement or sensor cleaning rather than just a reset.
F22: Low Water Pressure
What is happening: System pressure has dropped below the minimum operating level.
Common causes: Small leak in system, recently bled radiators, pressure relief valve discharge, expansion vessel needs recharging.
What to try: Top up pressure using the filling loop (see below). If pressure drops again within days, there may be a leak. Read our pressure guide for step by step instructions.
How to Top Up Pressure (Glow-worm)
If you are not comfortable using the filling loop, stop and call a Gas Safe engineer.
- Locate the filling loop (usually underneath the boiler, a braided silver hose with one or two valves).
- Ensure the boiler is off and cool.
- Open the valves slowly, a quarter turn at a time.
- Watch the pressure gauge rise to between 1.0 and 1.5 bar.
- Close both valves fully.
- Switch the boiler back on.
Do not exceed 2.0 bar. If you overfill, stop and call an engineer.
If you need to top up frequently (more than once a month), there is likely a leak. Call us for a diagnosis.
Frozen Condensate Pipe (Winter)
In freezing weather, a frozen condensate pipe is one of the most common causes behind F28 and F29 lockouts on Glow-worm boilers. This is often safe to resolve with the steps below. If you are unsure, or the boiler will not restart, call an engineer.
Signs: Boiler locked out with F28 or F29, freezing temperatures outside, gurgling sound when boiler tries to start.
What to do:
- Locate the condensate pipe (white or grey plastic pipe exiting to an outside drain).
- Pour warm water (not boiling) over the frozen section.
- Reset the boiler once thawed.
Do not use a naked flame or heat gun on plastic pipework.
Full instructions: Frozen condensate pipe guide.
If it keeps happening, we can reroute the pipe internally or add insulation to prevent future freezing.
Why These Faults Are Common in London Homes
Hard water, older pipework, and winter weather make certain faults more likely in London properties:
- F75 (pump and sensor): London’s hard water causes debris buildup over time, affecting pump performance and triggering F75 faults on older Glow-worm models.
- Frozen condensate pipes: External pipes exposed to freezing temperatures are a common cause of F28 and F29 faults in winter.
- Pressure fluctuations: Older London properties with microbore pipework or poorly balanced systems experience more F22 low pressure faults.
- Sludge accumulation: Hard water areas accumulate more magnetite sludge over time, restricting circulation and triggering F75 codes.
Glow-worm Models We Repair
We repair all Glow-worm gas boiler models including:
- Energy: Current combi range, compact and efficient
- Ultimate: Premium range with higher specifications
- Easicom: Popular mid range combi (now discontinued but widely installed)
- Betacom: Older combi range, parts still available
- Flexicom: System and combi models
- Ultracom: Older range, some parts availability constraints
We carry common Glow-worm parts and can source others quickly. As part of the Vaillant Group, many parts are shared with Vaillant boilers.
Common Glow-worm Problems
F75 pump and sensor faults: The most common Glow-worm repair, shared with Vaillant. Pump fails to create detectable pressure change. Often needs pump replacement or sensor cleaning.
Ignition failures (F28): Often caused by worn electrodes, faulty spark generator, or gas valve issues on older models.
Diverter valve sticking: Hot water works but radiators stay cold, or vice versa. Common on models over 8 years old.
Fan faults (F32): Fan not running at correct speed or failing to prove to the PCB.
PCB failure: Random lockouts, display glitches, or complete failure.
Heat exchanger scale: Kettling noises, overheating, reduced efficiency. See our guide to boiler noises.
Repair or Replace?
Glow-worm boilers typically last 10 to 15 years with proper maintenance. If yours is approaching that age and needs a major repair (heat exchanger, PCB, pump), replacement may be more cost effective.
Older models like the Ultracom are now reaching end of life with limited parts availability.
We give honest advice either way. Read more: Repair or replace? An engineer’s guide.
If you decide on a new boiler: New boiler installation.
🔧 Glow-worm F75, Kettling, or Cold Radiators?
If your Glow-worm is showing F75, making kettling noises, or has cold spots on radiators, the cause is often sludge or debris restricting flow through the pump and system.
London is a hard water area, and over time limescale and magnetite build up. A power flush clears debris and can prevent repeated pump failures. Learn more about power flushing.
Glow-worm Servicing
Annual servicing keeps your Glow-worm running efficiently and maintains your warranty. We service all Glow-worm models and provide a full report after each visit.
We recommend servicing in late summer or early autumn, before the heating season. Book your boiler service.
Renting? Landlords: Check This
Tenants: Your landlord is usually responsible for boiler repairs. Contact them first and keep written records, especially if you have no heating or hot water.
Landlords: Stay compliant with our Gas Safety Certificate (CP12) service. See our full London landlord checklist covering gas safety, EPCs, and maintenance requirements.
London Wide Coverage
We repair Glow-worm boilers across all London boroughs including North, South, East, West, and Central London. Our engineers are based throughout the city for fast response times.
For coverage and service areas, see our London coverage page.
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