Worcester Bosch
Worcester Bosch Temperature Sensor 8738903403
Temperature sensor for Worcester Bosch Greenstar 1000 Series boilers, manufacturer part number 8738903403.
At a glance
- Appliance family: Greenstar 1000 Series
- Also known as 1038353
£14.54
£12.12 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 Worcester Bosch temperature sensor 8738903403 is a boiler sensor used to measure water temperature within the appliance and feed that reading back to the control board. It is listed for Worcester Bosch Greenstar 1000 Series models. The sensor is supplied under manufacturer part number 8738903403.
Signs this part needs replacing
- Boiler locks out or fails to fire despite a call for heat or hot water
- Temperature readings that do not match the actual system or domestic hot water temperature
- Heating or hot water output that fluctuates or cuts out partway through a cycle
- Fault indication on the appliance linked to the temperature sensing circuit
Before you order
- Confirm the appliance model against the fit list above before ordering
- Check the existing sensor and its wiring connection for damage or corrosion
- Verify the manufacturer part number 8738903403 matches the part being removed
- Ensure any fault diagnosis points to the temperature sensor rather than another component in the circuit
Mechanical
| Part type | SENSORS |
|---|
Compliance
| Manufacturer part number (MPN) | 8738903403 |
|---|---|
| Alternative numbers | 1038353 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 1000 SERIES GR1000W 24 C NG | 47-800-38 | 47-800-38 | — | — |
| WORCESTER GREENSTAR 1000 SERIES GR1000W 30 C NG | 47-800-39 | 47-800-39 | — | — |
| WORCESTER GREENSTAR GR1000W 24 C NG | — | — | — | |
| WORCESTER GREENSTAR GR1000W 30 C NG | — | — | — |
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 documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.