Glow-worm
Glow-worm Heat Exchanger 0020025297
Bithermical heat exchanger assembly for the Glow-worm GW 23C gas boiler, part number 0020025297.
£549.12
£457.60 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The bithermical heat exchanger assembly for the Glow-worm GW 23C gas boiler, supplied under part number 0020025297. It transfers heat from the combustion gases to the appliance water circuit, serving both the heating and hot water sides of the boiler. It is a serviceable component and is replaced as a complete assembly.
Signs this part needs replacing
- Water leaking from the heat exchanger body or its connections
- Repeated pressure loss on the boiler with no visible external leak
- Kettling, banging or overheating during heating or hot water demand
- Discoloured or dirty system water indicating internal corrosion of the exchanger
- Reduced heating or hot water output that cannot be traced to other components
Before you order
- Check the appliance rating plate to confirm the model is the GW 23C
- Confirm the part number 0020025297 matches the component being removed
- Check whether any seals, gaskets or fixings are required separately for the installation
- Confirm the boiler is isolated and drained before work begins
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| GLOWWORM GLOWWORM GW 23C | — | — | — | |
| GLOWWORM GW 23C | 47-047-18 | 47-047-18 | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No technical questions yet for this part.
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