Glow-worm
Glow-worm Thermistor Sensor CXI HXI SXI GLOWWORM801722
Glow-worm 801722 thermistor thermometric sensor for CXI, HXI and SXI boilers, used to report temperature back to the boiler control board.
At a glance
- Part type: Thermistor thermometric sensor
- Appliance family: CXI, HXI, SXI
- Also known as GLOWWORM801722
£35.28
£29.40 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 801722 is a thermistor thermometric sensor supplied for Glow-worm CXI, HXI and SXI boiler ranges. It is a temperature-sensing component that feeds a resistance signal back to the boiler's control board, letting the appliance read flow or stored water temperature and regulate firing accordingly. Because the board relies on this signal to modulate output and to run its safety checks, a drifting or failed sensor affects how the boiler behaves long before any mechanical fault appears.
Signs this part needs replacing
- Boiler locks out or fails to fire, with a temperature-related fault code logged on the display
- Heating or hot water temperature reads noticeably high, low or erratic compared with the set point
- Radiators or hot water run hot then cold as the boiler short-cycles instead of modulating smoothly
- Intermittent operation that clears on reset and returns once the appliance warms up
- Resistance reading at the sensor plug falls outside the expected curve for the measured temperature
Before you order
- Confirm the model and GC number on the appliance data badge match the CXI, HXI or SXI range this sensor is listed for
- Check the existing sensor's part number and connector type against 801722 before removing it
- Inspect the sensor pocket and any sealing washer or O-ring at the same time, as these are often disturbed during removal
Mechanical
| Part type | Thermistor thermometric sensor |
|---|---|
| Appliance family | CXI, HXI, SXI |
Compliance
| Manufacturer part number (MPN) | 801722 |
|---|---|
| GC number | E84-003 |
| Barcode / EAN | 4024074501009 |
| Commodity code | 8533 40 00 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | 5037985028953, GLOWWORM801722, GLOWWORM801722, GLOWWORM801722, 254889043325, 1333191 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| GLOWWORM BRITISH GAS BG330 | 41-047-75 | 41-047-75 | — | — |
| GLOWWORM GLOWWORM GW 12HXI | — | — | — | |
| GLOWWORM GLOWWORM GW 15HXI | — | — | — | |
| GLOWWORM GLOWWORM GW 18HXI | — | — | — | |
| GLOWWORM GLOWWORM GW 18SXI | — | — | — | |
| GLOWWORM GLOWWORM GW 24CXI | — | — | — | |
| GLOWWORM GLOWWORM GW 24HXI | — | — | — | |
| GLOWWORM GLOWWORM GW 30CXI | — | — | — | |
| GLOWWORM GLOWWORM GW 30HXI | — | — | — | |
| GLOWWORM GLOWWORM GW 30SXI | — | — | — |
Showing 10 of 25 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 — BRITISH GAS BG330 (GC 41-047-75)
manualmanualGLOWWORM appliance manual — GW 12HXi (GC 41-047-73)
manualmanualGLOWWORM appliance manual — GW 15HXi (GC 41-047-74)
manualmanualGLOWWORM appliance manual — GW 18HXi (GC 41-047-63)
manualmanualGLOWWORM appliance manual — GW 18SXi (GC 41-047-72)
manualmanualGLOWWORM appliance manual — GW 24CXi (GC 47-047-23)
manualmanualGLOWWORM appliance manual — GW 24HXi (GC 41-047-69)
manualmanualGLOWWORM appliance manual — GW 30CXi (GC 47-047-24)
manualmanualGLOWWORM appliance manual — GW 30HXi (GC 41-047-64)
manualmanualGLOWWORM appliance manual — GW 30SXi (GC 41-047-62)
manualmanualGLOWWORM appliance manual — GW 35Ci (GC 47-047-28)
manualmanualGLOWWORM appliance manual — GW 38CXi (GC 47-047-27)
manualmanualGLOWWORM appliance manual — GW 38HXi (GC 41-047-71)
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