Baxi
Baxi NTC Sensor Inc Seal 7737908
Baxi NTC sensor supplied with seal, part number 7737908, for use in compatible Baxi combi and system boilers.
At a glance
- Also known as 1134954
£15.82
£13.18 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 Baxi 7737908 is an NTC sensor supplied with a seal. It is a temperature-sensing component used on compatible Baxi combi and system boilers, where it feeds water temperature data back to the appliance's control board. The seal is included so the sensor can be fitted with a correct, watertight joint at the point of installation.
Signs this part needs replacing
- Boiler locks out or shuts down with a temperature-related fault code
- Domestic hot water runs hot and cold instead of holding a steady temperature
- Heating flow temperature reads incorrectly or erratically on the display
- Sensor resistance readings fall outside the expected range for the water temperature
- Visible damage, corrosion or weeping at the sensor body or its seal
Before you order
- Confirm the appliance model and GC number against the fitment list above
- Check the fault code or resistance reading points to the sensor rather than the wiring or control board
- Inspect the sensor pocket and sealing face for damage before fitting the new part
- Have the boiler isolated and drained as required before removing the old sensor
Compliance
| Alternative numbers | 1134954 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI 424 ERP COMBI 2.1 | 47-077-74 | 47-077-74 | — | — |
| BAXI 430 ERP COMBI 2.1 | 47-077-75 | 47-077-75 | — | — |
| BAXI 436 ERP COMBI 2.1 | 47-077-76 | 47-077-76 | — | — |
| BAXI 615 SYSTEM 2 - FRONT FACING ANALOGUE PRESSURE GAUGE | 41-884-01 | 41-884-01 | — | — |
| BAXI 615 SYSTEM 2 - INTERNAL FIT PRESSURE GAUGE | 41-884-01 | 41-884-01 | — | — |
| BAXI 618 SYSTEM 2 - FRONT FACING ANALOGUE PRESSURE GAUGE | 41-884-02 | 41-884-02 | — | — |
| BAXI 618 SYSTEM 2 - INTERNAL FIT PRESSURE GAUGE | 41-884-02 | 41-884-02 | — | — |
| BAXI 624 COMBI 2 - FRONT FACING ANALOGUE PRESSURE GAUGE | 47-077-55 | 47-077-55 | — | — |
| BAXI 624 COMBI 2 - INTERNAL FIT PRESSURE GAUGE | 47-077-55 | 47-077-55 | — | — |
| BAXI 624 SYSTEM 2 - FRONT FACING ANALOGUE PRESSURE GAUGE | 41-884-03 | 41-884-03 | — | — |
Showing 10 of 39 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.
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