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Vaillant Cable Extension Thermal Fuse 6C 0020135109

Vaillant

Vaillant Cable Extension Thermal Fuse 6C 0020135109

Extension cable for the thermal fuse circuit (6C) in Vaillant ecoTEC PLUS and ecoTEC PRO gas boilers.

At a glance

  • Also known as 1383367
Manufacturer part no.
0020135109
Showing prices

£13.68

£11.40 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 0020135109 is an extension cable for the thermal fuse circuit, identified as a 6C cable. It is used in Vaillant ecoTEC PLUS and ecoTEC PRO gas boilers to extend the thermal fuse connection within the appliance wiring. The cable forms part of the boiler's safety circuit, linking the thermal fuse to the control system.

Signs this part needs replacing

  • Boiler locks out or fails to ignite with a thermal fuse fault indicated
  • Continuity test on the thermal fuse circuit shows an open circuit
  • Visible heat damage, scorching or brittleness on the cable or its connectors
  • Intermittent boiler shutdowns caused by a poor connection in the thermal fuse circuit
  • Thermal fuse has operated and the extension cable is being renewed as part of the repair

Before you order

  • Confirm the boiler model and GC number against the fitment list
  • Check the part number on the existing cable matches 0020135109
  • Note that some listed models are for Guernsey and Jersey only
  • Isolate the boiler from the electrical supply before fitting

Not sure which part?

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