Navien
Navien Burner Gasket 20043392A
Burner gasket (packing) for Navien LCB 700 combi, regular and system boilers.
At a glance
- Part type: packing / burner gasket
- Appliance family: LCB 700
£5.57
£4.64 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 Navien 20043392A is a burner gasket, listed by the manufacturer as a packing. It seals the burner mounting face on Navien LCB 700 boilers, preventing combustion gases from escaping past the joint. It is used across the LCB 700 combi, regular and system ranges.
Signs this part needs replacing
- Visible scorching, hardening or cracking of the gasket material
- Soot staining or dark marks around the burner mounting face
- A smell of combustion products in the boiler casing area
- The gasket breaks up or crumbles when the burner is removed for service
- The burner joint cannot be resealed to the manufacturer's specification on reassembly
Before you order
- Confirm the boiler model and variant against the fit list above
- Check the serial number shown on the appliance data badge
- Inspect the burner joint before ordering to confirm the gasket is the failed component
- Have the boiler isolated and made safe before any work on the burner assembly
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN LCB 700 COMBI EXTERNAL 21KW (Serial Number 1705) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 21KW (Serial Number 1705) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 28KW (Serial Number 1710) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 28KW (Serial Number 1710) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 36KW (Serial Number 1709) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 36KW (Serial Number 1709) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 21KW (Serial Number 1704) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 21KW (Serial Number 1704) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 28KW (Serial Number 1706) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 28KW (Serial Number 1706) | — | — | — |
Showing 10 of 36 compatible appliances.
Documents & drawings
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