Navien
Navien Main Heat Exchanger 30023252A
Main heat exchanger for Navien LCB 700 28KW combi, regular and system boilers, internal and external variants.
£629.57
£524.64 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 main heat exchanger for Navien LCB 700 series boilers. It transfers heat from the combustion circuit to the heating and domestic hot water circuits. This component is specific to the LCB 700 28KW range.
Signs this part needs replacing
- Water leaking or weeping from the heat exchanger body or connections
- Repeated loss of system pressure requiring regular topping up
- Reduced domestic hot water or heating output
- Kettling, banging or gurgling noises from the boiler
- Visible corrosion, scale or debris around the heat exchanger
Before you order
- Confirm the appliance is a Navien LCB 700 28KW model
- Identify whether the boiler is the combi, regular or system variant, and internal or external
- Check the existing heat exchanger part number before ordering
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN LCB 700 COMBI EXTERNAL 28KW (Serial Number 1710) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 28KW (Serial Number 1710) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 28KW (Serial Number 1706) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 28KW (Serial Number 1706) | — | — | — | |
| NAVIEN LCB 700 REGULAR EXTERNAL 28KW (Serial Number 1478) | — | — | — | |
| NAVIEN LCB 700 REGULAR EXTERNAL 28KW (Serial Number 1478) | — | — | — | |
| NAVIEN LCB 700 REGULAR INTERNAL 28KW (Serial Number 1477) | — | — | — | |
| NAVIEN LCB 700 REGULAR INTERNAL 28KW (Serial Number 1477) | — | — | — | |
| NAVIEN LCB 700 SYSTEM EXTERNAL 28KW (Serial Number 1476) | — | — | — | |
| NAVIEN LCB 700 SYSTEM EXTERNAL 28KW (Serial Number 1476) | — | — | — |
Showing 10 of 12 compatible appliances.
Documents & drawings
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