Can you replace the three-way diverter valve on my Navien boiler?

Yes. BoilerPart.ca supplies and professionally installs the genuine Navien three-way diverter valve across Greater Vancouver. Our licensed technicians diagnose the fault, fit the correct OEM part, and test the system.

Do you sell the Navien three-way diverter valve 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 Navien three-way diverter valve as part of a certified repair so it is fitted correctly, tested for safety, and keeps your Navien warranty valid.

How do I know my Navien three-way diverter valve has failed?

Typical symptoms include: Hot water but no heating (or vice-versa); Radiators warm when running hot water; Lukewarm hot water; Valve motor noise. On Navien boilers this can also show as E003 Ignition Failure or E012 Flame Loss. We confirm the diagnosis before any work.

Navien · Hydronic & Water

Navien Three-Way Diverter Valve Replacement in Greater Vancouver

Genuine Navien three-way diverter valve, supplied and professionally installed by Technical Safety BC–licensed gas fitters. Never sold for DIY.

Call (604) 359-1081 Request Service

The Three-Way Diverter Valve on Your Navien Boiler

The three-way diverter valve directs hot primary water either to the heating circuit or to the hot-water plate exchanger. When it sticks you get heat but no hot water, hot water but no heat, or radiators warming when you run a tap.

On Navien systems — including models such as NCB-240E, NCB-210E, NHB-150 — a failing three-way diverter valve often shows up as e003 ignition failure or related symptoms. We diagnose it precisely and install the correct genuine Navien part.

Typical Lifespan

8-12 years

Brand

Navien

Part Category

Hydronic & Water

Safety Warning

Radiators getting warm whenever you run a hot tap is a classic stuck-diverter symptom.

Signs of a Failing Navien Three-Way Diverter Valve

Hot water but no heating (or vice-versa)

Radiators warm when running hot water

Lukewarm hot water

Valve motor noise

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.