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Vaillant Wiring Harness 0020135156

Vaillant

Vaillant Wiring Harness 0020135156

Wiring harness for Vaillant ecoTEC PLUS 630, 637, 837 and 937 gas boilers, part number 0020135156.

At a glance

  • Also known as 1383497
Manufacturer part no.
0020135156
Showing prices

£78.62

£65.52 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 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 Vaillant 0020135156 is a wiring harness for Vaillant ecoTEC PLUS gas boilers. It carries the electrical connections between the boiler's control components and the appliance wiring circuit. It is supplied as a single harness assembly.

Signs this part needs replacing

  • Boiler fails to power up, or power is lost intermittently
  • Fault codes relating to communication or sensor circuits
  • Visible damage, scorching or brittleness on the harness or its connectors
  • Loose, corroded or pushed-back terminals in the connector plugs
  • Intermittent operation when the harness or its connectors are moved

Before you order

  • Confirm the boiler model and variant (R1, R2) against the fit list
  • Check the part number on the existing harness where it is still legible
  • Inspect the connector plugs and pins for damage before fitting
  • Isolate the electrical supply to the appliance before removal

Not sure which part?

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