Can you replace the wiring harness on my John Wood boiler?

Yes. We supply and professionally install the genuine part across Greater Vancouver. Our licensed technicians diagnose the fault, fit the correct OEM part, and test the system.

Do you sell the John Wood wiring harness on its own?

No. Boiler parts are supplied and installed by our licensed technicians as part of a repair — we do not sell parts for individual or DIY purchase. We install the John Wood wiring harness as part of a certified repair so it is fitted correctly, tested for safety, and keeps your John Wood warranty valid.

How do I know my John Wood wiring harness has failed?

Typical symptoms include: Intermittent, hard-to-repeat faults; Codes that come and go; Melted or corroded connectors; Faults after vibration/handling. On John Wood boilers this can also show as No Hot Water or Pilot Problems. We confirm the diagnosis before any work.

John Wood · Controls & Sensors

John Wood Wiring Harness Replacement in Greater Vancouver

Genuine John Wood wiring harness, supplied and professionally installed by Technical Safety BC–licensed gas fitters. Never sold for DIY.

Call (604) 359-1081 Request Service

The Wiring Harness on Your John Wood Boiler

The wiring harness ties together the control board, sensors, igniter, valves and pump. Heat-damaged, chafed, or corroded harness connectors cause intermittent faults that are notoriously hard to chase down without proper diagnosis.

On John Wood systems — including models such as Envirosense, JW Power Vent, JW Direct Vent — a failing wiring harness often shows up as no hot water or related symptoms. We diagnose it precisely and install the correct genuine John Wood part.

Typical Lifespan

15+ years

Brand

John Wood

Part Category

Controls & Sensors

Safety Warning

Intermittent faults that come and go are often a chafed or corroded harness, not the part itself.

Signs of a Failing John Wood Wiring Harness

Intermittent, hard-to-repeat faults

Codes that come and go

Melted or corroded connectors

Faults after vibration/handling

Parts Are Professionally Installed — Not Sold for DIY

For your safety and to keep your manufacturer warranty valid, BoilerPart.ca does not sell loose boiler parts over the counter or for self-installation. Under BC regulations, gas appliance components must be installed by a licensed gas fitter. Every part we source is genuine OEM and is professionally fitted, tested, and certified by our Technical Safety BC–licensed technicians as part of a complete repair or installation.

Why Have Us Install Your John Wood Wiring Harness?

Genuine John Wood OEM wiring harness — no generic substitutes

Installed by Technical Safety BC–licensed gas fitters

Keeps your John Wood manufacturer warranty intact

Full combustion, pressure and safety testing after fitting

Up-front pricing — you approve before we start

Backed by our workmanship guarantee

About the Wiring Harness All John Wood service

John Wood Wiring Harness Service Across Metro Vancouver

Frequently Asked Questions

John Wood Wiring Harness Replacement, Done Right

Genuine John Wood parts, professionally installed and tested across Greater Vancouver.

Call (604) 359-1081 Request Service

A Division of CanroHeat.ca · Licensed Gas Fitters · Serving Greater Vancouver since 1985