Potterton
Potterton Burner Assembly 400kW 5142121
Burner assembly rated at 400kW for Potterton Commercial Sirius FS 400 gas boilers.
£1,141.20
£951.00 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 Potterton 5142121 is a burner assembly rated at 400kW, supplied as a 400KW (FS400) burner unit. It forms the combustion component within the Potterton Commercial Sirius FS 400 boiler and is listed under gas boiler spares as a burner. The assembly is the part through which fuel and air are introduced and combustion is established inside the appliance.
Signs this part needs replacing
- Persistent combustion faults or burner lockout that other servicing does not resolve
- Visible heat damage, distortion or corrosion on the burner body
- Unstable or irregular flame pattern across the burner surface
- Soot deposits or incomplete combustion evidence traced to the burner
- Physical damage to the burner assembly found during a service inspection
Before you order
- Confirm the appliance model is Potterton Commercial Sirius FS 400 before ordering
- Check the existing burner assembly and its rating against the 400kW FS400 specification
- Verify the manufacturer part number 5142121 matches the part being replaced
- Take note of any combustion settings and commissioning requirements before removal
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMMERCIAL POTTERTON COMMERCIAL SPARES | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS FS 400 | — | — | — |
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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