Glow-worm HVAC Repair Cost (Ireland, 2026)
Estimates reviewed July 2026 · appliance-repair figures maintained by a licensed appliance technician.
Glow-worm HVAC repairs typically run €40–€3,800, depending on the HVAC system, the problem, and your local labour costs. Glow-worm is a value brand — its parts sit at the mainstream baseline. Every figure is an Estimated range in euro, never a fake precise number. Reviewed July 2026.
Glow-worm repair cost by HVAC Estimated
These ranges apply Glow-worm's parts tier (1.00× the mainstream baseline) to the parts portion only — labour is unchanged and localizes to your area. Tap an HVAC system for its full problem-by-problem breakdown and the localizer.
| HVAC | Estimated Glow-worm range |
|---|---|
| Glow-worm heat pump repair | €60–€3,800 |
| Glow-worm boiler repair | €40–€1,400 |
| Glow-worm thermostat & controls repair | €50–€720 |
Base: published rates from 3 Irish repair companies (2026-07) · Ireland national base range (CSO NEA06 2024) · Reviewed July 2026 · Estimated
What changes a Glow-worm repair bill
- Brand tier — Value-positioned boiler but not a value-priced repair: as a Vaillant Group brand its spares are sold at group OEM prices. The Dublin listings show boards from EUR 168.00 to EUR 315.00 (PCB control box S900847 EUR 168.00, PCB S900817 EUR 248.00, Micron 60-80 PCB EUR 282.00, Micron 30-50 PCB NTPO EUR 315.00; median ~EUR 265.00, i.e. right at the EUR 270.00 mainstream board) and fan units EUR 245.00-405.00, so despite the cheaper boiler the parts are level with mainstream and the factor is held at 1.0 rather than discounted to its tier
- Parts vs labour — the brand and tier shift the parts price; labour tracks your area's wage index, not the brand.
- The specific fault — a sensor, seal, or valve is far cheaper than a compressor, motor, or control board.
- DIY vs professional — Some Glow-worm faults (filters, seals, hoses) are DIY-feasible for confident owners; sealed-system and control-board work is a professional job.
Glow-worm error & fault codes
When a Glow-worm HVAC system shows a fault code, the diagnosis — and the price — gets specific. The most looked-up Glow-worm codes:
Glow Worm F.91 Glow Worm F.22 Glow Worm F.28 Glow Worm F.29 Glow Worm F.78 Glow Worm F.89 Glow Worm F02 Glow Worm F03 Glow Worm F79 Glow Worm F.13 Glow Worm F.00 Glow Worm F.01 +34 more →
Common Glow-worm problems
Glow-worm boilers present with the usual class faults: falling pressure, ignition lockout, condensate blockage, and hot-water failure from a diverter valve or plate heat exchanger. Fault codes generally point to sensors, the fan or the pump rather than to the primary heat exchanger. Noise and kettling complaints in hard-water areas are scale-related.
Is Glow-worm expensive to repair?
Glow-worm is the value-positioned brand within the Vaillant Group (acquired 2001), sharing group engineering while sitting below Vaillant in specification and warranty tier. Its repair profile tracks the general UK boiler class. It has also launched an air-source heat pump range with matching cylinders and controls. Spares are widely available through UK merchants and the Vaillant Group parts channel, and some components cross-reference to Vaillant equivalents, which helps sourcing. Common wear parts are routinely stocked. PCBs and gas valves are genuine-channel items.
Estimated labour-cost-localized ranges — see the methodology for the localization method and named sources.
Reviewed by a Red Seal–certified appliance technician who also holds a Technical Safety BC gas ticket (Gas-C) and an ODS/halocarbon refrigerant ticket (CFC/HCFC/HFC).