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Choosing a Glow-worm installer means opting for unparalleled expertise and reliability in your heating solutions. With a commitment to quality and customer satisfaction, Glow-worm installers are fully qualified professionals who understand the intricacies of our innovative heating systems. They not only ensure a seamless installation process but also provide tailored advice to maximize efficiency and comfort in your home. Why Glow-worm?
Holiday of a Lifetime
The Glow-worm Mystery Trip has always proved popular. This year, as installers continued to work hard throughout the pandemic to ensure the nations’ homes remained warm and running efficiently, the idea of packing your bags and heading off into the sunset, felt even more important. That is just what 45 lucky Glow-worm Club Energy installers who secured their place on the 2021 Mystery Trip have done, by doing what they do best - fitting boilers. Having just returned from the holiday of a lifetim...
Gas Safe Registered Boiler and Heating Engineers in Cardiff
Get in touch to arrange a reliable and timely boiler service for your Cardiff property with Glow-worm Club Energy approved boiler engineers. Whether you are looking for recommendations on replacing your current boiler, carrying out regular boiler maintenance or emergency hot water or heating repairs, our friendly engineers are here to help.
Boiler servicing, repairs and maintenance in Cardiff
Our network of Gas Safe Registered heating specialists in Wales can service your boiler if y...Privacy Policy
We take the protection of your personal data very seriously. This privacy and cookie notice informs you about the processing of your personal data and this applies to you when you use this website www.glow-worm.co.uk and/or request any of the services mentioned on the website. Specific or supplementary privacy notices may apply to certain services. The website and information, products and services are owned by Vaillant Group UK Limited and are designed for use by residents of the UK, if you re...
Complaints
Complaints form Fill in the form below and a member of our team will contact you.
The secret is out… the Mystery Trip is back!
Published 12-11-2019 After the success of the re-launch of the infamous Glow-worm Mystery Trip this year, we are excited to announce that the Mystery Trip will be back in 2021. With a new destination and more opportunities to secure your space, we’re offering more fun than ever before! As we are so excited about the 2021 trip, we are giving you even more chances to secure your spot on the trip of a lifetime. Over the next two months we are counting any boilers registered towards your 2020 targe...
Fault Finding Codes
Fault finding codes for the Ultracom₂ cxi range
Fault finding codes for the Ultracom₂ cxi range Codes Description F00 Flow heating temperature sensor fault F01 Return heating temperature sensor fault F10 Flow heating temperature sensor fault F11 Return heating temperature sensor fault F20 Overheating fault F22 Low water pressure F23 Water circulation fault F24 Water circulation fault F26 Fault in gas valve F27 Flame detection fault F28 Ignition fault F29 Loss of flame during operation F32 Incorrect air pressure F49 EBUS voltage fault F61 Fau...
Supporting your learning
Spending quieter periods to undertake the training that you’ve been putting off will pay dividends in the future. It’s an opportunity to refresh your existing skills or train in new technologies, such as heat pumps, which could open different revenue streams for your business. Online training courses can be completed without leaving the house. If you want to brush up on your marketing skills, the Google Digital Garage offers free courses on everything from planning a social media strategy to SE...
For fitting ten Glow-worm Energy or Compact boilers purchased at a Wolseley branch, we’ll give you £500 cashback! Simply activate the promotion in your Club Energy account from the 1st May 2023 and start registering eligible products, it’s as easy as that. Once the promotion ends, you’ll be credited with £500 in your Club Energy account, where you can spend it on vouchers, services or even withdraw it as a business cheque. With the extra money in the bank, you’ll be able to take care of some bi...
Winter Weather Advice: Keeping warm in winter
Maintaining a warm home is crucial, and if you're curious about the ideal temperature. The government suggests keeping it between 18-21°C during winter. However, this may differ depending on factors such as age, medical conditions, and the type of room in the house. Increasing the temperature can mean your boiler has to work harder and for longer which can result in higher heating bills. The good news is that there are a number of ways to help you manage your home’s heating during the winter, b...
Thursday 29th May 2025
Why training with Glow-worm is worth it
Why is my boiler noisy? Causes and Fixes
An annual boiler service and regularly monitoring the pressure gauge are some of the simple ways you can maintain a healthy boiler system. Boilers don’t require lots of maintenance but by regularly inspecting your boiler in between services, it can make it easier to identify issues before they occur. If you do notice your boiler is making noises that are out of the ordinary, it is always best to try and identify the issue early to avoid costly repair bills in the future. Typically your boiler s...
Fault Finding Codes
Fault finding codes for the Xtrafast 96/120E1 range
Fault finding codes for the Xtrafast 96/120E1 range Codes Description F00 No fault F02 Air flow fault F04 Ignition fault - flame detection F05 Overheating F06 Central heating thermistor/wiring fault F07 Domestic hot water thermistor/wiring fault F08 Storage vessel thermistor/wiring fault F09 System pressure sensor fault F10 Fan fault F11 Poor circulation F12 User interface fault F13 Main pcb fault F14 Central heating flow temperature > 97 degrees F15 Gas mechanism fault F20 Communication fault ...
Glow-worm boilers
90 years of commitment to top quality, reliability and exceptional durability have made Glow-worm one of the UK’s leading heating manufacturers. We have built our reputation on delivering products which are straightforward, dependable and designed with you in mind. Our product range is clearly defined to meet the needs of a wide range of UK homes. With universal flueing systems, diagnostics, user controls and installation accessories, once you have installed and used one Glow-worm appliance, it...
GLOW-WORM KICK OFF, in partnership with Wolseley
VAILLANT GROUP UK LIMITED (Glow-worm)– Kick Off
1.1 Subject to clauses 1.2, 1.3, 1.4 and 1.5 below, the opportunity to win the world cup experience detailed at clause 3 (Prize) is open to applicants, over the age of 18 years, who are resident in mainland United Kingdom (Promotion). For the avoidance of doubt, mainland United Kingdom excludes, without limitation, the Channel Islands, Isle of Man and/or Northern Ireland (Territory) (Applicant, and the term Applicants shall be interpreted accordingly). 1.2 The Promotion is not open to any Appli...
The Glow-worm Academy
As part of our mission to Keep Britain Glowing, we offer a wide range of courses to support our installers. We offer both practical in-centre courses, and online training options, to help find the right courses and training journey for you. Why Train with Glow-worm Discover the excellence of our Glow-worm training courses firsthand. Hear from in-centre Training Manager, Lee and Area Sales Manager, Nazia as they shar...Winter Weather Advice: Boiler fault codes and what to do if they occur
Our boilers are all equipped with specific diagnostics that identify problems in your central heating system through display codes. Fault codes are indicators that signal an error has occurred in your boiler system. The codes help give a simplified understanding of the problem at hand for experts and homeowners. Various boiler codes can appear on your system, whether it is on the front of the system or your control, each with a unique identity resembling specific faults. Some codes are the same...
Gas Safe Registered Boiler and Heating Engineers in Basildon
Get in touch to arrange a reliable and timely boiler service for your Basildon property with Glow-worm Club Energy approved boiler engineers. Whether you are looking for recommendations on replacing your current boiler, carrying out regular boiler maintenance or emergency hot water or heating repairs, our friendly engineers are here to help.
Boiler servicing, repairs and maintenance in Basildon
Our local network of Gas Safe Registered heating specialists in the East of England can se...Vaillant Group UK Limited - Vaillant National Health Service staff 25% discount repair breakdown promotion
1. QUALIFICATION 1.1 Subject to clauses 1.2, 1.3, 1.4 and 1.5 below, Vaillant Group UK Limited (Vaillant) provides this NATIONAL HEALTH SERVICE 25% breakdown repair (Promotion), which is open to all NATIONAL HEALTH SERVICE employee applicants, over the age of 18 years, who are resident in mainland United Kingdom. For the avoidance of doubt, mainland United Kingdom excludes, without limitation, the Channel Islands, Isle of Man and/or Northern Ireland (Territory) (Applicant, and the term Applican...
Privacy Policy
We take the protection of your personal data very seriously. This privacy policy informs you about the processing of your personal data and this applies to you when you use this website www.glow-worm.co.uk and/or request any of the services mentioned on the website. Specific or supplementary privacy policies may apply to certain services. The website and information, products and services are owned by Vaillant Group UK Limited and are designed for use by residents of the UK, if you reside in an...
What is Boiler Plus?
The new Boiler Plus legislation has been designed to ensure that all households in the UK are energy efficient. Boiler Plus is the biggest piece of legislation since 2005 when the UK became the first country to become “all-condensing”. All new boilers from April 2018 must have a minimum ErP efficiency of 92% with time and temperature controls fitted if they aren't already present and working correctly. Also combi boilers, the most popular boiler type in the market require one of four additional...
Learning is Earning
With the UK population expected to grow by 3 million people by 2028¹, the race to build more and more homes has rapidly increased, and with heating season soon to be on the agenda, the home heating market is inevitably at its most pressured. Against this backdrop, many installers would agree that trying to fit training into their busy working schedules can be challenging, especially for those who are self-employed. Yet, making a small investment in their learning can reap a wealth of rewards to...
Energy saving tips for renters
Are you a renter who is looking for different ways to reduce your energy consumption around the home?
A hot water cylinder is a well-insulated tank which stores water after it’s been heated. Water is heated through your boiler system and is then stored, at temperature, ready for you to use whenever it’s needed. By storing hot water in this way, there’s no need to run the heating system constantly resulting in lower energy bills, without subjecting household members to cold showers. These cylinders are not in all houses or flats however if you have one, they are normally found in the airing cupb...
Boilers
The most common type of boiler in the UK, gas boilers work by drawing gas from the mains supply and using it to heat water in the boiler. Water is then circulated around the house via a system of pipes and radiators.