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Monday 19th May 2025
Why pairing Glow-worm boilers with our controls is your best move yet
Gas Safe Registered Boiler and Heating Engineers in Southampton
Boiler maintenance, repairs and new boiler installations in Southampton
Whether you are looking for recommendations on upgrading your boiler, carrying out annual boiler maintenance or emergency repairs, our friendly engineers can help take care of your heating system to ensure your Southampton home is toasty all winter long. All local heating engineers are Gas Safe registered and experienced with our wide range of boilers - enquire today and receive a quote.Boiler servicing, repai...
Should I turn my boiler off in the summer?
Is it safe to turn off a combi boiler in the summer? Is it safe to turn off a system boiler in the summer? Is it safe to turn off a open vent boiler in the summer? Should I turn off my boiler completely in the summer? Should I turn off my boiler whilst on holiday? Does turning your boiler off save money? Installing a heating control Should I get my boiler serviced in the summer?
Is it safe to turn off a combi boiler in the summer?
Whilst it is safe to turn off your combi boiler durin...How to increase the water pressure in your boiler
Have you turned on your shower to find only a weak trickle of water? Or perhaps you have a pile of dishes to clean and you’re struggling to get enough water from your taps to clean them? It’s possible you’ve got low water pressure which can be very frustrating. There are multiple reasons why you might be experiencing low water pressure and this can be due to problems within your home as well as some external factors such as the location of the property and the distance from the service reservoi...
Gas Safe Registered Boiler and Heating Engineers in Liverpool
Boiler maintenance, repairs and new boiler installations in Liverpool
Whether you are looking for recommendations on upgrading your boiler, carrying out annual boiler maintenance or emergency repairs, our friendly engineers can help take care of your heating system to ensure your Liverpool home is toasty all winter long. All local heating engineers are Gas Safe registered and experienced with our wide range of boilers - enquire today and receive a quote.Boiler servicing, repairs a...
Glow-worm Guarantee Registration
Your Glow-worm guarantee covers you for the repair of any defects related to the manufacture of your Glow-worm appliance. The repair has to be completed by one of our Vaillant Service Engineers* and will cover both parts and labour Your guarantee does not cover defects which are unrelated to the manufacture of the product or a result of misuse. We'll send you the full terms and conditions of the guarantee along with your guarantee confirmation. Alternatively, you can read them here. *Glow-worm ...
High Efficiency Combination Boilers
Glow-worm’s range of Combi Boilers provide central heating and hot water without the need for a separate tank to store water; hence you can easily tuck them away under the stairs or in kitchen cabinets. This is the most popular types of boiler in the UK, now found in around 70% of homes.
Bringing better business to your home
Glow-worm are proud to announce that they will be hosting an additional four Built to Last development courses in partnership with The Boiler Business for its customers after the success of the previously held courses. Starting with the first course on May 17th, customers will be able to secure their spot on the online course led by industry experts Tom and Rob, designed at giving installers the tools to run successful business specifically designed for the Plumbing and Heating industry. Instal...
We want to help keep Britain glowing in the safest possible way for you and your loved ones, which is why we have introduced our homeSAFE program to Glow-worm installers. HomeSAFE aims to support installers with the necessary tools, training and equipment they need to work safely in your home. You can now ensure your loved ones safety whilst keeping your home cosy knowing that a homeSAFE qualified installer has attended our training course, has the correct PPE equipment and has been advised on ...
Contact The Glow-worm Team
Need to speak to us? Choose your enquiry type from the drop-down menu below and a member of our team will be in touch. Our repair line opening hours are as follows: Monday - Friday: 8am - 6pm Saturday: 8am - 3pm Sunday: 8am - 12pm Our homeowner technical line opening hours are as follows: Monday - Friday: 8am - 6pm Saturday: 9am - 12pm Sunday: Closed Calls may be recorded and monitored for quality and training purposes. Our call centre is open 7 days a week 364 days a year. Calls cost up to 13p...
Gas Safe Registered Boiler and Heating Engineers in Worcester
Glow-worm supplies and installs energy-efficient and reliable boilers for properties in Worcester. Besides installing new boilers, our heating specialists can carry out boiler maintenance and various repairs to keep your boiler and the overall heating system working as efficiently as possible. Find your local boiler engineer from our directory of Glow-worm Club Energy approved installers today.
Boiler servicing, repairs and maintenance in Worcester Our network of Gas Safe Registered h...
MiGo Xpert is free to use and provides you with instant access to detailed boiler data, fault code history, and diagnostic insights . That means less time spent diagnosing issues on-site and more time providing outstanding service to your customers.
What is MiGo Xpert?
MiGo Xpert is an app built specifically for Glow-worm installers, enabling you to remotely monitor your connected boilers and provide proactive support. By integrating seamlessly with our eBUS communication protocol, M...Glow-worm heads to PHEX Manchester
Published 27-09-2019 Glow- worm, a proudly British brand, will be at the Plumbing and Heating Exhibition (PHEX) at Old Trafford Stadium in Manchester on the 16th-17th of October, showcasing their highly efficient boiler range. PHEX is a free event and is open from 10am on both days. With plenty to see and do across both days, including free stadium tours, it’s an event not to be missed. PHEX Manchester provides you with the perfect opportunity to get your questions answered by our specialist Gl...
Drum Hill Scout Camp Boiler Donation
Glow-worm is delighted to support the continued improvement of facilities at Drum Hill Scout Camp with the donation of a new boiler. The boiler is for the leaders’ hut at the site in Little Eaton that is the county campsite for Derbyshire Scouts. Camp Hill has been welcoming groups to the 80-acre site since 1927 and has been a feature of life for many local families. Generations have used the woodlands and camping fields to explore a range of activities and many have enjoyed overnight stays in ...
What is a Smart Control?
Smart controls use intelligent technology to detect the current temperature in your home which then switches your central heating on and off as needed based on your settings. Glow-worm smart controls use our eBUS protocol to communicate with your boiler to ensure it is operating efficiently whilst meeting your desired temperature. By installing a smart control (also known as smart thermostats) and an internet gateway alongside your Glow-worm boiler in your ho...Boiler Servicing Fault Finding Codes
Fault finding codes for the CI Plus range
Fault finding codes for the CI Plus range Codes Description F1 Ignition fault F2 Fan/APS F3 Air fault F4 Ignition fault F5 Overheat Fault F6 Central heating flow thermistor F7 Domestic hot water thermistor F8 Tank thermistor (N/A For this appliance) F9 Water pressure sensor fault (please contact GW technical department for further information F10 Central return flow thermistor F11 Main board connection fault F12 Connection fault between main pcb and display pcb F13 Main pcb connection fault F14...
TERMS & CONDITIONS 1. QUALIFICATION 1.1 Subject to clauses 1.2, 1.3, 1.4 and 1.5 below, Vaillant Group UK Limited, trading as Glow-worm (Glow-worm) provides this Glow- worm National Beer Day Prize Pack Competition (Competition), which is open to Entrants, over the age of 18 years, who are resident in mainland United Kingdom (Territory) (Entrant, and the term Entrants shall be interpreted accordingly). 1.2 The Competition is not open to any Entrant who is, at any time during the period indicated...
Glow-worm legacy product ranges
We’re proud of our British heritage and have 90 years of expertise in developing and manufacturing heating products here in the UK.
Some of our legacy products are still being used to provide heating and hot water in homes across the country. From combi boilers to controls, or system boilers to cylinder ranges, if you need any information on our legacy product ranges we have added a range of useful information below. If you require any additional information, please contact us on 0345 602 2922.
Discontinued literature
Search for any legacy documents including manuals and brochures by selecting the lett...Privacy Policy
Privacy & Cookie Notice
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Glow-worm elevate online training with a new central hub
Glow-worm has elevated it’s online training offer with the introduction of the Glow-worm Academy, a new online portal allowing installers to follow a tailored learning journey to develop their technical skills with Glow-worm heating systems. The Glow-worm Academy offers installers access to over 85 years' worth of British heritage and expert knowledge in a friendly, easy-to-use 24/7 access portal. Glow-worm Academy truly allows installers to carry out training by fitting around their work sched...
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Fault Finding Codes
Fault finding codes for the Ultracom hxi range
Fault finding codes for the Ultracom hxi range Codes Description F1 Ignition fault F3 Fan unable to reach ignition speed F4 Ignition fault F5 Overheat Fault F6 Central heating flow thermistor F9 Water pressure sensor fault, blocked flow filter or pump fault F10 Central return flow thermistor F11 Main board connection fault F13 PCB memory or sensing fault F14 Gas valve control defective F15 E-bus voltage failure F22 Low water pressure or ignition temperature rise too slow F25 Circulation fault F...
Central Heating Controls
A heating control allows you to optimise home comfort while saving money. Choosing the right central heating control for your home is important when installing a heating system. This is because it provides heat and water to your home. Glow-worm has a range of wired and wireless smart controls to help you manage your heating at home and remotely for those nights when you stay out just a bit later or if you’re getting home earlier than you thought. They can also help you optimise your heating sys...
MiGo speaks the same language as your boiler to ensure you’re only using the required amount of energy - saving you money. MiGo makes it all possible. Control your heating and hot water needs from your smart phone even when you’re away. Increase your comfort, lower your energy bills. Because MiGo has been exclusively engineered to work with our new and existing boilers, you’ll save more energy and money than with any other Wi-Fi enabled thermostat. MiGo only ever uses your energy as and when it...