Navien
Navien Water Pressure Sensor 30024399A
Water pressure sensor 30024399A for Navien NCB500 combi boilers, used to monitor system water pressure.
At a glance
- Part type: water pressure sensor
- Appliance family: NCB500
£42.91
£35.76 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 Navien 30024399A is a water pressure sensor used on Navien NCB500 combi boilers. It monitors the water pressure within the appliance and feeds that reading back to the boiler's control system. The sensor forms part of the boiler's safety and modulation circuit, allowing the control board to respond to pressure changes during operation.
Signs this part needs replacing
- Boiler locks out or displays a water pressure related fault code
- Pressure reading on the boiler display is missing, fixed or erratic
- Boiler fails to fire despite the system being correctly filled
- Pressure gauge and boiler display readings disagree
- Water weeping from the sensor body or its connection point
Before you order
- Confirm your boiler model and serial number against the fitment list
- Check the fault code or pressure reading fault before ordering, as similar symptoms can come from other components
- Inspect the sensor plug and wiring for damage or corrosion
- Isolate and drain down as required before fitting
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN NCB500-1S+/32K COMBI - (Serial Number 3924) | — | — | — | |
| NAVIEN NCB500-1S+/32K COMBI - (Serial Number 3924) | — | — | — | |
| NAVIEN NCB500-2S+/41K COMBI - (Serial Number 3712) | — | — | — | |
| NAVIEN NCB500-2S+/41K COMBI - (Serial Number 3712) | — | — | — | |
| NAVIEN NCB500-2S/37K COMBI - (Serial Number 3735) | — | — | — | |
| NAVIEN NCB500-2S/37K COMBI - (Serial Number 3735) | — | — | — |
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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