Navien
Navien Printed Circuit Board 30021889A
Printed circuit board for Navien LCB 700 System boilers, part number 30021889A.
At a glance
- Part type: printed circuit board
- Appliance family: LCB 700 System
£156.00
£130.00 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 the main control board used in Navien LCB 700 System boilers. It manages the boiler's operating sequence, monitoring and safety functions, and communication with the appliance's controls and sensors. This board is supplied under Navien part number 30021889A.
Signs this part needs replacing
- The boiler fails to fire or does not respond when there is a call for heat
- No display, blank screen or unlit indicators on the appliance control panel
- Repeated fault codes or lockouts that clear only temporarily
- Erratic behaviour such as pumps or fans running when they should not
- Visible damage to the board, including scorching, burnt tracks or swollen components
Before you order
- Confirm the boiler model and output match one of the LCB 700 System variants listed above
- Check the serial number of the appliance against the unit on site before ordering
- Inspect the existing board for connector layout and any revision markings so the correct part is supplied
- Isolate the electrical supply to the boiler before removing or fitting the board
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN LCB 700 SYSTEM EXTERNAL 21KW (Serial Number 1471) | — | — | — | |
| NAVIEN LCB 700 SYSTEM EXTERNAL 21KW (Serial Number 1471) | — | — | — | |
| NAVIEN LCB 700 SYSTEM EXTERNAL 28KW (Serial Number 1476) | — | — | — | |
| NAVIEN LCB 700 SYSTEM EXTERNAL 28KW (Serial Number 1476) | — | — | — | |
| NAVIEN LCB 700 SYSTEM EXTERNAL 36KW (Serial Number 1480) | — | — | — | |
| NAVIEN LCB 700 SYSTEM EXTERNAL 36KW (Serial Number 1480) | — | — | — | |
| NAVIEN LCB 700 SYSTEM INTERNAL 21KW (Serial Number 1434) | — | — | — | |
| NAVIEN LCB 700 SYSTEM INTERNAL 21KW (Serial Number 1434) | — | — | — | |
| NAVIEN LCB 700 SYSTEM INTERNAL 28KW (Serial Number 1475) | — | — | — | |
| NAVIEN LCB 700 SYSTEM INTERNAL 28KW (Serial Number 1475) | — | — | — |
Showing 10 of 12 compatible appliances.
Documents & drawings
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