Navien
Navien Burner Gasket Packing 20043390A
Burner gasket packing 20043390A for Navien LCB 700 combi, regular and system boilers.
At a glance
- Part type: burner gasket (packing)
- Appliance family: LCB 700
£33.61
£28.01 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 20043390A is a burner gasket, listed as a packing, for the LCB 700 boiler family. It seals the burner mounting face to prevent combustion gases escaping at the joint. It is a service part intended for replacement when the existing gasket is disturbed or degraded.
Signs this part needs replacing
- Visible cracking, hardening or flattening of the gasket material
- Soot or dark staining around the burner mounting face
- Combustion or flue gas odour at the burner joint
- Whistling or unusual noise from the burner seal area
- The gasket breaks up or sticks to the mating face when the burner is removed
Before you order
- Confirm the appliance is a Navien LCB 700
- Check whether the boiler is combi, regular or system
- Check the internal or external variant and the 21KW or 28KW output
- Match the appliance serial number against the manufacturer's parts list
- Compare the existing gasket against part number 20043390A
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 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) | — | — | — | |
| NAVIEN LCB 700 REGULAR EXTERNAL 21KW (Serial Number 1474) | — | — | — | |
| NAVIEN LCB 700 REGULAR EXTERNAL 21KW (Serial Number 1474) | — | — | — |
Showing 10 of 24 compatible appliances.
Documents & drawings
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