Navien
Navien Printed Circuit Board 30031146B
Printed circuit board for Navien NCB500 combi boilers, used to control boiler operation.
At a glance
- Part type: printed circuit board
£135.19
£112.66 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 printed circuit board is a Navien control board for NCB500 series combi boilers. It manages boiler sequence, monitoring and safety functions. The board is identified by part number 30031146B.
Signs this part needs replacing
- Boiler does not respond to a call for heat or hot water
- No display, blank screen, or unresponsive control panel
- Repeated fault codes or lockout that cannot be cleared
- Fan, pump or ignition sequence behaving erratically
- Visible heat damage, corrosion or moisture on the board
Before you order
- Confirm the boiler model and serial number match the fitment list
- Check the existing board part number and connector layout before ordering
- Isolate the electrical supply and photograph the wiring before removal
- Ensure the board is suitable for the specific NCB500 variant installed
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.
No technical questions yet for this part.
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