Glow-worm
Glow-worm Flow Switch with Cables GLOWWORMS801189
At a glance
- Also known as GLOWWORMS801189
£41.16
£34.30 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 S801189 is a flow switch supplied with its connecting cables. It is a replacement hydraulic component for Glow-worm boilers, where it monitors water movement through the appliance circuit and signals the control board that flow is present. When the switch fails to register flow, the boiler cannot complete its sequence and will not fire.
Signs this part needs replacing
- The boiler runs the pump but does not fire on a hot water or heating demand
- Intermittent lockouts that clear on reset and return shortly afterwards
- No flow signal reported during a service or diagnostic check
- Domestic hot water runs cold while the pump is clearly running
- Fault codes relating to water flow or the hydraulic circuit appear on the display
Before you order
- Check the part number on the existing component and match it to S801189
- Confirm the boiler model and GC number from the appliance data badge
- Inspect the housing seals and O-rings on removal and replace them if they are perished
Mechanical
| Part type | Flow switch |
|---|
Compliance
| Manufacturer part number (MPN) | S801189 |
|---|---|
| GC number | E27-177 |
| Commodity code | 8536 50 80 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | GLOWWORMS801189, 1336592 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| GLOWWORM COMPACT 100E | 47-047-08A | 47-047-08A | — | — |
| GLOWWORM COMPACT 75E | 47-047-06A | 47-047-06A | — | — |
| GLOWWORM COMPACT 80E | 47-047-07A | 47-047-07A | — | — |
| GLOWWORM GLOWWORM COMPACT 100E | — | — | — | |
| GLOWWORM GLOWWORM COMPACT 75E | — | — | — | |
| GLOWWORM GLOWWORM COMPACT 80E | — | — | — | |
| SAUNIER DUVAL SAUNIER DUVAL SD 30E | — | — | — |
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.
Not sure which part?
Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.