Navien
Navien Mixing Chamber 20030283A
Navien mixing chamber for NCB-CE system and combination boilers, part number 20030283A.
At a glance
- Part type: mixing chamber
- Appliance family: Navien NCB-CE ERP range
£37.70
£31.42 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 mixing chamber is a Navien component used on NCB-CE system and combination boilers. It sits in the water circuit and blends flows within the boiler to help maintain a stable delivered water temperature. The part is identified by the manufacturer part number 20030283A.
Signs this part needs replacing
- Unstable or fluctuating hot water temperature at the outlets
- Water temperature that drifts between hot and lukewarm during a draw-off
- Reduced or inconsistent flow through the boiler water circuit
- Scale or debris accumulation within the chamber affecting mixing
- Evidence of leakage or weeping around the chamber body or its connections
Before you order
- Confirm the boiler model and output match the NCB-CE ERP range listed above
- Check the part number on the existing component against 20030283A
- Verify the appliance serial number falls within the relevant NCB-CE build range
- Isolate the boiler and its water supply before any strip-down work
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN NCB-CE 20KW SYSTEM BOILER ERP - (Serial Number 6662) | — | — | — | |
| NAVIEN NCB-CE 20KW SYSTEM BOILER ERP - (Serial Number 6662) | — | — | — | |
| NAVIEN NCB-CE 23KW SYSTEM BOILER ERP - (Serial Number 6663) | — | — | — | |
| NAVIEN NCB-CE 23KW SYSTEM BOILER ERP - (Serial Number 6663) | — | — | — | |
| NAVIEN NCB-CE 24KW COMBINATION BOILER ERP - (Serial Number 0128) | — | — | — | |
| NAVIEN NCB-CE 24KW COMBINATION BOILER ERP - (Serial Number 0128) | — | — | — | |
| NAVIEN NCB-CE 24KW COMBINATION BOILER ERP - (Serial Number 2570) | — | — | — | |
| NAVIEN NCB-CE 24KW COMBINATION BOILER ERP - (Serial Number 2570) | — | — | — | |
| NAVIEN NCB-CE 28KW COMBINATION BOILER ERP - (Serial Number 0129) | — | — | — | |
| NAVIEN NCB-CE 28KW COMBINATION BOILER ERP - (Serial Number 0129) | — | — | — |
Showing 10 of 12 compatible appliances.
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.
Not sure which part?
Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.