Viessmann
Viessmann 7828980 Cable Harness X20
Viessmann cable harness X20 for the flow and overheat circuit on Vitodens 100-W combi boilers.
At a glance
- Appliance family: Vitodens 100-W combi boilers (BPJA, Wb1B and Wb1C variants)
- Also known as 2321030
£36.65
£30.54 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 the Viessmann cable harness X20, supplied under part number 7828980. It is a wiring loom used on Vitodens 100-W combi boilers, carrying the flow, overheat and related connections into the X20 plug position on the appliance. It forms part of the boiler's internal wiring and sensor circuit.
Signs this part needs replacing
- Overheat or flow sensor faults appearing on the boiler display
- Intermittent lockouts traced to the X20 plug or its loom
- Chafed, cracked or heat-damaged insulation on the harness
- Corroded, loose or discoloured terminals in the X20 connector
- Sensor resistance readings that change when the harness is moved
Before you order
- Confirm the boiler model and serial number against the fit list above
- Check the existing X20 plug and loom for damage before replacing
- Verify the fault is in the harness rather than the sensor or thermostat it connects to
- Isolate the appliance from the electrical supply before fitting
Compliance
| Alternative numbers | 2321030 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS 100-W BPJA 25 KW COMBI SERIAL No. 7501297 | 47-819-26 | 47-819-26 | — | — |
| VIESSMANN VITODENS 100-W BPJA 29 KW COMBI SERIAL No. 7501298 | 47-819-27 | 47-819-27 | — | — |
| VIESSMANN VITODENS 100-W WB1B 26 KW COMBI SERIAL No. 7373061 | 47-819-12 | 47-819-12 | — | — |
| VIESSMANN VITODENS 100-W WB1B 30 KW COMBI SERIAL No. 7373063 | 47-819-13 | 47-819-13 | — | — |
| VIESSMANN VITODENS 100-W WB1B 35 KW COMBI SERIAL No. 7373065 | 47-819-14 | 47-819-14 | — | — |
| VIESSMANN VITODENS WB1C 100-W 26KW COMBI SERIAL No. 7499425 | 47-819-20 | 47-819-20 | — | — |
| VIESSMANN VITODENS WB1C 100-W 30 KW COMBI SERIAL No. 7499427 | 47-819-21 | 47-819-21 | — | — |
| VIESSMANN VITODENS WB1C 100-W 35 KW COMBI SERIAL No. 7499429 | 47-819-22 | 47-819-22 | — | — |
Documents & drawings
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