Baxi
Baxi Pressure Sensor 7753909
Baxi pressure sensor, part number 7753909, for use with selected Baxi HP40 and Assure HP50 appliances.
At a glance
- Also known as 8909166
£225.11
£187.59 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 7753909 is a pressure sensor used in Baxi heating appliances. It monitors system pressure and provides a signal to the appliance control, allowing the boiler or heat pump to regulate operation and raise a fault condition when pressure falls outside the expected range. It is listed for use across the Baxi HP40 and Assure HP50 ranges.
Signs this part needs replacing
- System pressure readings that are erratic or do not match a gauge reading at the filling loop
- Appliance locking out or refusing to run with a pressure-related fault displayed
- Pressure fault codes appearing repeatedly after the system has been correctly filled and vented
- Pump or heating circuit running when the system pressure is known to be low
- No change in displayed pressure after the system is topped up or drained
Before you order
- Confirm your appliance model against the fit list above, as the sensor is listed only for the HP40 and Assure HP50 variants shown
- Check the part number on the existing sensor or in the manufacturer's parts list for your appliance
- Confirm the fault is with the sensor rather than with system pressure, wiring or the appliance control board
- Have the appliance isolated and depressurised before removal and fitting
Compliance
| Alternative numbers | 8909166 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI ASSURE HP50-11-1PHMB | — | — | — | |
| BAXI ASSURE HP50-11-3PHMB | — | — | — | |
| BAXI ASSURE HP50-13-1PHMB | — | — | — | |
| BAXI ASSURE HP50-13-3PHMB | — | — | — | |
| BAXI HP40-11-1PHMB | — | — | — | |
| BAXI HP40-11-3PHMB | — | — | — | |
| BAXI HP40-13-1PHMB | — | — | — | |
| BAXI HP40-13-3PHMB | — | — | — |
Documents & drawings
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