Can you replace the mixing valve on my Navien 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 Navien mixing 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 mixing 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 mixing valve has failed?

Typical symptoms include: Radiant floor too hot or too cold; Scalding or fluctuating hot water; Uneven floor heat; No temperature control. 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 Mixing Valve Replacement in Greater Vancouver

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

Call (604) 359-1081 Request Service

The Mixing Valve on Your Navien Boiler

Thermostatic mixing valves blend hot supply with cooler return water to deliver a safe, stable temperature — essential for in-floor radiant heat and for tempering domestic hot water. A failed valve causes overheating loops or scald-risk water.

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

Typical Lifespan

10-15 years

Brand

Navien

Part Category

Hydronic & Water

Safety Warning

A radiant floor that suddenly runs too hot may have a failed mixing valve — important to fix to protect the floor.

Signs of a Failing Navien Mixing Valve

Radiant floor too hot or too cold

Scalding or fluctuating hot water

Uneven floor heat

No temperature control

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.