Navien
Navien Main Heat Exchanger 30018827A
Main heat exchanger for Navien NCB-CE ERP system and combination boilers.
At a glance
- Part type: main heat exchanger
£712.78
£593.98 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 is the primary component that transfers heat from the boiler's combustion circuit into the heating and domestic hot water circuits. This unit is manufactured by Navien for the NCB-CE ERP range of system and combination boilers. It is the part that the burner fires against, so it sits at the centre of the appliance's heat transfer performance.
Signs this part needs replacing
- Water weeping or visible staining around the heat exchanger body or its connections
- Repeated pressure loss in the heating circuit that requires frequent topping up
- Kettling, banging or rumbling noises from the appliance during firing
- Reduced heating or hot water output despite the boiler running
- Discoloured or dirty system water indicating internal corrosion or debris build-up
Before you order
- Confirm the appliance model matches one of the NCB-CE ERP variants listed above
- Check the appliance serial number against the unit being worked on
- Verify the existing part number is 30018827A before removal
- Allow for a full system flush and inhibitor dose when fitting a new heat exchanger
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN NCB-CE 28KW SYSTEM BOILER ERP - (Serial Number 6664) | — | — | — | |
| NAVIEN NCB-CE 28KW SYSTEM BOILER ERP - (Serial Number 6664) | — | — | — | |
| NAVIEN NCB-CE 33KW SYSTEM BOILER ERP - (Serial Number 6665) | — | — | — | |
| NAVIEN NCB-CE 33KW SYSTEM BOILER ERP - (Serial Number 6665) | — | — | — | |
| NAVIEN NCB-CE 34KW COMBINATION BOILER ERP - (Serial Number 0130) | — | — | — | |
| NAVIEN NCB-CE 34KW COMBINATION BOILER ERP - (Serial Number 0130) | — | — | — | |
| NAVIEN NCB-CE 34KW COMBINATION BOILER ERP - (Serial Number 2572) | — | — | — | |
| NAVIEN NCB-CE 34KW COMBINATION BOILER ERP - (Serial Number 2572) | — | — | — | |
| NAVIEN NCB-CE 40KW COMBINATION BOILER ERP - (Serial Number 0131) | — | — | — | |
| NAVIEN NCB-CE 40KW COMBINATION BOILER ERP - (Serial Number 0131) | — | — | — |
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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