Viessmann
Viessmann Coding Plug 20330303
Coding plug 20330303 for Viessmann Vitodens WB3A boilers built from 29.10.2004, used to set appliance configuration.
At a glance
- Part type: coding plug
- Also known as 2321546
£32.23
£26.86 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 coding plug, manufacturer part number 20330303, produced by Viessmann for the Vitodens appliance family. It is fitted to the boiler to establish the appliance configuration, with the part applicable to units built from 29.10.2004 onwards. The coding plug allows the control to identify the correct boiler variant and output.
Signs this part needs replacing
- The boiler control fails to register the correct appliance variant or output.
- Configuration-related fault codes appear on the control display.
- The coding plug is missing, loose in its socket, or visibly damaged.
- The appliance behaves as if an incorrect boiler type is set after a control or PCB change.
Before you order
- Confirm the appliance model and output match the fitment listed above.
- Check the appliance build date is 29.10.2004 or later.
- Verify the existing coding plug part number before ordering.
Compliance
| Alternative numbers | 2321546 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS WB3A SYSTEM 49KW SERIAL No. 7176778 | — | — | — |
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 documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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