Viessmann
Viessmann Coding Plug 2034:0304 7823558
Viessmann coding plug 2034:0304 (7823558) for Vitodens WB3A System 66kW boilers, fitting the appliance control assembly to set the correct configuration.
At a glance
- Part type: coding plug
- Also known as 20340304, 2321436
£34.51
£28.76 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 Viessmann coding plug 2034:0304 is a small configuration component that sits on the control assembly of Viessmann Vitodens WB3A System boilers. It holds the coding that identifies the appliance variant to the boiler control electronics, so the board runs the correct operating parameters for that model. It is supplied under part number 7823558.
Signs this part needs replacing
- Boiler control does not recognise the correct appliance variant after a board swap
- Configuration or coding related fault codes displayed on the appliance
- Boiler running outside its expected output or modulation behaviour for the model
- Coding plug physically damaged, corroded or loose on the control assembly
- Original coding plug missing when a replacement control board is fitted
Before you order
- Confirm the appliance model and serial number against the compatibility list before ordering
- Check the coding reference printed on the existing plug reads 2034:0304
- Note that the alternative number 2321436 may appear on the part currently fitted
- Isolate the electrical supply to the appliance before working on the control assembly
Mechanical
| Part type | Coding Plug |
|---|
Compliance
| Manufacturer part number (MPN) | 7823558 |
|---|---|
| Alternative numbers | 20340304, 2321436 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS WB3A SYSTEM 66KW | — | — | — | |
| VIESSMANN VITODENS WB3A SYSTEM 66KW SERIAL No. 7176779 | — | — | — |
Documents & drawings
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