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If you become aware of breaches of law, the Vaillant Group’s Code of Conduct or our internal rules and regulations, the persons to report such breach to can be contacted by all our employees, suppliers and customers. In addition with the BKMS whistleblower system, all our employees, suppliers and customers also have access to a tool that they can use to highlight suspicious behavior to our compliance team. This report can be made anonymously, because we understand that such matters cannot alway...
By booking with Glow-worm, you will benefit from a rigorous 12 point check on your boiler by an expert, in-house factory trained engineer - who better to look after your boiler than the people who made it? Important: Having your boiler serviced once a year by a Gas Safe registered engineer ensures that you maintain your guarantee after the first year. avoid future repair when problems are spotted early. save energy as our engineer will check your boiler is running efficiently. increase its life...
Privacy Policy
Vaillant Group UK Limited (“Vaillant”) is committed to safeguarding your privacy. This Privacy Statement describes why and how we collect, use, and who we may disclose your personal data (information) with, during your visit to this web site. We encourage you to read this Privacy Statement before submitting information. By using this web site, you acknowledge that you understand and agree to the terms of this Privacy Statement. Should you have any questions regarding the use of your data in acc...
Fault Finding Codes
Fault finding codes for the Ultracom₂ 35 store
Fault finding codes for the Ultracom₂ 35 store Codes Description F00 Flow heating temperature sensor fault F01 Return heating temperature sensor fault F02 Hot water temperature sensor fault F03 Storage tank temperature sensor fault F10 Flow heating temperature sensor fault F11 Return heating temperature sensor fault F12 Hot water temperature sensor fault F13 Storage tank temperature sensor fault F20 Overheating fault F22 Low water pressure F23 Water circulation fault F24 Water circulation fault...
Find a local, recommended installer
Why choose a Glow-worm Club Energy installer? We want to make sure the Glow-worm boiler you choose is a perfect fit for you and your home. That’s why we created the Glow-worm Club Energy Installer scheme, a network of fully trained, Gas Safe registered independent installers that will: • Provide expert knowledge to find a Glow-worm boiler that's a perfect fit for you • Provide a free, no-obligation quote • To give you extra peace of mind, Glow-worm Club Energy Installers can also offer you excl...
Glow-worm Guarantee Terms and Conditions
To receive the full benefits of the extended guarantee the following terms and conditions must be followed or your claim will be rejected: If your installer advises you of a boiler fault, please contact Glow-worm Service.
1. Installation and commissioning must be carried out by a Gas Safe** registered engineer, within 6 months of despatch of the boiler from Glow-worm’s warehouse. 2. All works must be fully in accordance with the installation manual and these terms and conditions. 3. The Benchmark log book must be completed by the installer at the point of installation and retained on site for inspection during an engineer’s visit. 4. The guarantee will commence from the date of installation. To validate this Glo...
Get your Mystery Trip targets
Next year's all-expenses-paid Mystery Trip will see you glowing all the way to Vietnam. As well as experiencing the famous city and its unique culture, you'll be visiting well-known landmarks and sampling amazing local cuisine. It's a feature-packed trip that's sure to be a truly unforgettable experience. This mesmerising city offers iconic sights and amazing contrasts, from beautiful colonial-era architecture to towering skyscrapers. Walk streets bustling with energy or relax in a riverside ca...
Glow-worm Jobs & Recruitment
Glow-worm is a part of the Vaillant Group who currently employes 12,000 people all over Europe and China. To view the current opportunies to join the Vaillant family please Click here
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Fault Finding Codes
Fault finding codes for the Ultracom sxi range
Fault finding codes for the Ultracom sxi 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...
Fault codes Meaning Possible cause F.00 Fault: Flow temperature sensor NTC plug not plugged in or has come loose, multiple plug on the PCB not plugged in correctly, interruption in cable harness, NTC sensor defective F.01 Fault: Return temperature sensor NTC plug not plugged in or has come loose, multiple plug on the PCB not plugged in correctly, interruption in cable harness, NTC sensor defective F.10 Short circuit: Flow temperature sensor NTC sensor defective, short circuit inthe cable harnes...
Practical heating tips
1) Stay in control of your heating One of the best ways to keep your home at just the right temperature is to install a smart control. They can be retrofitted to your existing boiler and it ensures you only use exactly the right amount of energy your home needs. A control like the Glow-worm MiGo also means you can control your heating remotely – so if you’re late home, you can delay the heating coming on. After all, there’s no point wasting energy and money heating an empty home. Learn more abo...
Controls
Central heating and domestic hot water controls are key to providing a comfortable living environment and minimising costs through increased efficiency.
Choosing the right control is important when installing a heating system to provide warmth and hot water to your home. A control allows you to change your environment optimising your home comfort as well as minimising costs through efficiency. There are a number of different controls available for hot water and heating systems from simple on/off controls to internet connected smart home control which allow you to moderate your home from your smartphone or tablet. The advantages of heating contr...
Glow-worm - great value easy to use boilers for your home
Over 80 years pedigree manufacturing heating systems All boilers made in the UK at award-winning Derbyshire factory 7-years guarantee on our Energy boiler range for peace of mind Supported by service team with 250 engineers and UK call centre Installed by a network of independent Glow-worm installers Replace boiler Our boilers go through 499 quality checks at the factory to ensure reliability. Find your perfect boiler Delivering instant hot water with easy to use controls. Review our Energy...
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Design Service
Glow-worm offer a complete Heating Design Service to suit your individual site development requirements. Already tested and proven by many of the major national house builders, Glow-worm's comprehensive Heating Design Service ensures cost effective, efficient and high quality design solutions backed by full indemnity cover.
A heating designer is allocated to your account and then on receipt of your house type drawings, elevations and floor layouts, the designer carries out heat loss calcu...
Technical Help
Get instant answers to a wide variety of technical questions at your fingertips. click here
Fault Finding Codes
Fault finding codes for the Compact s range
Fault finding codes for the Compact s range Symtoms Possible Faults No DHW Check external controls, Please test for 230V on switch live contact No C/H Check external controls, Please test for 230V on switch live contact No C/H or DHW Check external controls, Please test for 230V on switch live contact Boiler locks out within 10 seconds Check pump proving switch, air pressure switch and overheat stat Poor burner pressure Check burner pressure/ignition adjustment pots on PCB Back to overview
Heritage Of Glow-worm
The Glow-worm Boiler and Fireplace Co Ltd starts producing boilers at the Derwent Foundry in Derbyshire, utilising the strong currents of the River Derwent to drive the manufacturing plant. Glow-worm produces ‘balanced flue’ - the room sealed, gas heating and hot water boiler. Creating balanced flued appliances gives increased flexibility with boiler siting and improved safety for the homeowner, as the appliance is completely room sealed. Glow-worm grows further with the introduction of domesti...
Frozen condensate pipe
During low temperatures it's possible that your condensate pipe may freeze, if the pipe exits outside of your property. The condensate pipe is usually a white overflow pipe, similar to one you may find on a washing machine or sink waste pipe. It allows your boiler to dispose of condensation to an outside drain via this pipe. The pipe will usually be located on the external wall outside from where your boiler is. Check out the steps below or download our handy guide. Download our handy guide her...
How to comply with Boiler Plus
MiGo personal heating assistant MiGo is the smart thermostat and app specifically developed to work with Glow-worm boilers. It can control your heating and hot water from a smartphone device (available on iOS and Android) wherever you are and whenever you require it. It ticks the Boiler Plus box for smart controls, load and weather compensation. Climapro2 RF control Climapro2 is Glow-worm’s most advanced wireless programmable room thermostat. Central heating and hot water can be simply programm...
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. Terms & con...
Boilers
Our ranges use the latest in boiler technology to keep your home warmer for longer.
Advantages of having a modern boiler: Energy efficiency up to 98% A reduction in energy use by up to 30% compared to old heating systems Produces hot water and a warm home quickly Value for money and quick to install Less soot during combustion Combination (Combi) Combi boilers are quite simply boilers which do two different things in combination. They heat water as well as providing central heating for your home from the same unit. Show more on combi boilers These boilers heat the water as it ...
Glow-worm - great value easy to use boiler for your home
great value easy to use boiler for your home
Our boilers go through 499 quality checks at the factory to ensure reliability. Find your perfect boiler Delivering instant hot water with easy to use controls. Review our Energy range 7-year guarantees supported 7 days a week. Contact our UK Service team for help. What does Glow-worm deliver? Choose our convenient solutions for smaller households to benefit from hot water on demand and a perfectly heated home. View our combi boiler range Energy combi boiler front facing These boilers a...
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