Glow-worm
Glow-worm Thermostat Control S202539
Thermostat control for Glow-worm K F B and Space Saver KFB boilers, part number S202539.
At a glance
- Also known as 1333613
£0.01
£0.01 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 Glow-worm thermostat control S202539 is a boiler thermostat component used on Glow-worm K F B and Space Saver KFB appliances. It forms part of the boiler's temperature regulation circuit, controlling the heat output in response to the setting on the control. The part is listed under the manufacturer reference S202539.
Signs this part needs replacing
- The boiler does not respond when the thermostat control is turned up or down.
- The appliance runs continuously and the water or heating reaches a higher temperature than the setting calls for.
- The boiler short-cycles, cutting in and out more often than normal.
- Temperature output is erratic, with no consistent relationship to the control position.
- The control spindle or knob feels loose, stiff or fails to move through its full range.
Before you order
- Confirm the appliance model against the fit list above, as K F B and Space Saver KFB variants are covered by different model numbers.
- Check the GC number on the appliance data badge to confirm the exact boiler variant.
- Read the existing thermostat control and compare the part number with S202539 before ordering.
- Isolate the electrical supply to the boiler before removing or fitting any control component.
Compliance
| GC number | 397-893 |
|---|---|
| Alternative numbers | 1333613 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| GLOWWORM K F B 20 | 41-319-07 | 41-319-07 | — | — |
| GLOWWORM K F B 30 | 41-319-08 | 41-319-08 | — | — |
| GLOWWORM K F B 40 | 41-319-09 | 41-319-09 | — | — |
| GLOWWORM K F B 50 | 41-319-10 | 41-319-10 | — | — |
| GLOWWORM K F B 60 | 41-319-11 | 41-319-11 | — | — |
| GLOWWORM K F B 70 | 41-319-12 | 41-319-12 | — | — |
| GLOWWORM SPACE SAVER KFB 20 | 41-319-22 | 41-319-22 | — | — |
| GLOWWORM SPACE SAVER KFB 30 | 41-319-08 | 41-319-08 | — | — |
| GLOWWORM SPACE SAVER KFB 40 | 41-319-09 | 41-319-09 | — | — |
| GLOWWORM SPACE SAVER KFB 50 | 41-319-10 | 41-319-10 | — | — |
Showing 10 of 12 compatible appliances.
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.
GLOWWORM appliance manual — K F B 30 (GC 41-319-08), K F B 40 (GC 41-319-09), K F B 50 (GC 41-319-10), SPACE SAVER KFB 30 (GC 41-319-08), SPACE SAVER KFB 40 (GC 41-319-09), SPACE SAVER KFB 50 (GC 41-319-10)
manualmanualGLOWWORM appliance manual — K F B 60 (GC 41-319-11), K F B 70 (GC 41-319-12), SPACE SAVER KFB 60 (GC 41-319-11), SPACE SAVER KFB 70 (GC 41-319-12)
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