Potterton
Potterton Wiring Harness 24V (X20 - X21 - X42) 5142454
24V wiring harness with X20, X21 and X42 connections for Potterton Commercial Sirius 2 and Sirius 3 boilers.
£147.60
£123.00 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
This is a 24V wiring harness carrying the manufacturer part number 5142454, identified by its X20, X21 and X42 connector references. It is a Potterton Commercial harness intended for use in Sirius 2 and Sirius 3 boiler appliances, where it links the control and low-voltage circuits across those plug points. The harness is supplied as the loom assembly only.
Signs this part needs replacing
- Intermittent or total loss of communication between the boards linked by the X20, X21 or X42 plugs
- Boiler cutting out, locking out or failing to fire with no other fault identified
- Visible damage to the loom, such as chafed, scorched or brittle conductors
- Loose, corroded or heat-damaged pins in the X20, X21 or X42 connectors
- Fault codes or erratic readings traced to the low-voltage harness rather than the connected components
Before you order
- Confirm the appliance is a Potterton Commercial Sirius 2 or Sirius 3 model as listed in the fitment table
- Check the existing harness for the X20, X21 and X42 connector references to confirm a like-for-like match
- Verify the part number 5142454 against the markings on the harness being removed
- Inspect the mating connectors on the appliance for damage before fitting a replacement harness
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMMERCIAL POTTERTON COMMERCIAL SPARES | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS50 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS70 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS130 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS150 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS200 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS250 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS50 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS70 | — | — | — |
Documents & drawings
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