Glow-worm boiler repair & replacement
Energy, Betacom and Ultimate repairs and replacements.
Glow-worm boilers
Working on Glow-worm in the West Midlands
Glow-worm is Vaillant's budget brand, and it shows in a good way — a lot of the internal parts are shared with Vaillant, so spares are easy to get and repairs are usually straightforward.
They're a common landlord and new-build fit across the West Midlands. Expect around ten years from an Energy or Betacom if it's serviced and the system water is clean.
We cover Halesowen, Dudley, Stourbridge, Birmingham, Solihull, Wolverhampton, Bromsgrove, Kidderminster and the wider West Midlands.
Ranges
Glow-worm models we see most
Energy / Energy Plus
Current mainstream combi and system range. Vaillant-derived internals.
Betacom / Betacom4
Budget combi, widely fitted in rentals. Cheap parts.
Ultimate / Ultracom
Older ranges still common. Parts availability is getting patchier.
Micron / Hideaway
Pre-2005 units. Usually a replacement rather than a repair.
Common faults
What goes wrong with Glow-worm boilers
F1 — ignition lockout
No flame detected. Gas, electrodes or a blocked condensate pipe.
F22 — low water pressure
Needs repressurising. Repeated loss means a leak or a failed expansion vessel.
F75 — pressure sensor / pump
No pressure change detected on firing. Common on Energy models; usually the sensor or vessel.
F28 — failed to ignite
Repeated ignition attempts failed. Gas valve, electrode or condensate.
Cold water in the shower
Diverter valve sticking or a scaled plate heat exchanger — very common.
Showing a code on the display? Look it up in our fault code guide before you call — some of them you can clear yourself in ten minutes.
Repair or replace
Our honest view
Glow-worms are cheap to repair thanks to the shared Vaillant parts bin. Under ten years old, repair. Older Micron, Hideaway and Ultracom units are usually better replaced.
Replacements are Worcester Bosch Greenstar or Viessmann Vitodens, both with up to a 12-year manufacturer guarantee registered in your name.
Our diagnostic visit is £99 inc VAT and it comes off the bill if we carry out the repair. You get a fixed price before we touch anything — no hourly rates and no surprises on the invoice. We’re Gas Safe registered, Which? Trusted Trader endorsed and rated 4.9 across 206+ reviews.
Glow-worm questions we get asked
Do you repair Glow-worm boilers?
Yes — all current ranges including Energy, Betacom and Ultimate. Parts are widely available so most repairs are first-visit fixes.
Are Glow-worm boilers any good?
They're a solid budget option owned by Vaillant, sharing many of the same components. Not as long-lived as a Worcester or Viessmann, but easy and cheap to maintain.
How much is a Glow-worm repair?
Usually £120–£300 inc VAT with a fixed price agreed before we start. The £99 diagnostic is refunded against the repair.
Book it in
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60 second boiler quote
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