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Viessmann Cable Wiring Harness X8/X9/Ionization 7839456

Viessmann

Viessmann Cable Wiring Harness X8/X9/Ionization 7839456

Viessmann cable wiring harness for the X8, X9 and ionization connections on Vitodens 222-F appliances.

At a glance

  • Also known as 2322064
Manufacturer part no.
7839456
Showing prices

£64.44

£53.70 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Viessmann cable wiring harness X8/X9/ionization is a multi-way electrical loom used on Vitodens 222-F condensing appliances. It carries the X8 and X9 plug connections along with the ionization probe circuit, linking the appliance's control and combustion monitoring components. The harness is identified by Viessmann part number 7839456.

Signs this part needs replacing

  • The appliance fails to ignite or locks out because the ionization signal is interrupted
  • Fault codes relating to flame detection or ionization appear on the control unit
  • Visible heat damage, brittle insulation or chafing on the harness wiring
  • Loose, corroded or poor contact at the X8 or X9 plug connections
  • Intermittent electrical faults that change when the loom is moved

Before you order

  • Confirm the appliance model and serial number against the fit list above
  • Check the existing harness designation and plug positions before removal
  • Inspect the X8 and X9 connectors and the ionization lead for damage elsewhere in the circuit

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.