Glow-worm
Glow-worm Pilot Injector S203509
Pilot injector for Glow-worm K F B and Spacesaver gas boilers, marked Johnson Controls 4212 and replacing code 203509.
At a glance
- Also known as 1333797
- Gas-carrying work must be carried out by a Gas Safe registered engineer
£17.02
£14.18 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 pilot injector meters the gas supply to the pilot burner on Glow-worm gas boilers, producing the small standing flame that lights the main burner. This example is marked Johnson Controls 4212 and carries the Glow-worm part number S203509, replacing the earlier code 203509. It is a service item on the K F B and Spacesaver appliance families.
Signs this part needs replacing
- Pilot flame is weak, yellow, or lifts away from the burner
- Pilot fails to light, or extinguishes shortly after ignition
- Boiler locks out repeatedly with no heating or hot water
- Soot or discolouration around the pilot assembly
- Pilot flame size alters after cleaning or servicing the injector
Before you order
- Confirm your appliance model against the fit list above
- Check the existing injector is marked Johnson 4212 or carries the old code 203509
- Inspect the pilot assembly for other worn components before refitting
- Gas-carrying work must be carried out by a Gas Safe registered engineer
Compliance
| GC number | 394-163 |
|---|---|
| Barcode / EAN | 4024074501177 |
| Alternative numbers | 1333797 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| GLOWWORM GLOWWORM K F B 20 | — | — | — | |
| GLOWWORM GLOWWORM K F B 30 | — | — | — | |
| GLOWWORM GLOWWORM K F B 40 | — | — | — | |
| GLOWWORM GLOWWORM K F B 50 | — | — | — | |
| GLOWWORM GLOWWORM K F B 60 | — | — | — | |
| GLOWWORM GLOWWORM K F B 70 | — | — | — | |
| GLOWWORM GLOWWORM SPACESAVER 20-30F | — | — | — | |
| GLOWWORM GLOWWORM SPACESAVER 20-30RF | — | — | — | |
| GLOWWORM GLOWWORM SPACESAVER 30-40F | — | — | — | |
| GLOWWORM GLOWWORM SPACESAVER 30-40RF | — | — | — |
Showing 10 of 51 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)
manualmanualGLOWWORM appliance manual — SPACE SAVER 20-30F (GC 41-313-71), SPACE SAVER 30-40F (GC 41-313-68), SPACE SAVER 40-50F (GC 41-313-70), SPACE SAVER 50-60F (GC 41-313-69)
manualmanualGLOWWORM appliance manual — SPACE SAVER 65-75F (GC 41-313-38)
manualmanualGLOWWORM appliance manual — SPACE SAVER COMPLHEAT 30 (GC 41-319-42), SPACE SAVER COMPLHEAT 40 (GC 41-319-43), SPACE SAVER COMPLHEAT 50 (GC 41-319-44)
manualmanualGLOWWORM appliance manual — SPACE SAVER COMPLHEAT 60 (GC 41-319-45), SPACE SAVER COMPLHEAT 70 (GC 41-319-46)
manualmanualGLOWWORM appliance manual — ULTIMATE 80FF (GC 41-319-60)
manualNo technical questions yet for this part.
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