Can you replace the flow switch on my Navien boiler?

Yes. BoilerPart.ca supplies and professionally installs the genuine Navien flow switch across Greater Vancouver. Our licensed technicians diagnose the fault, fit the correct OEM part, and test the system.

Do you sell the Navien flow switch 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 flow switch 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 flow switch has failed?

Typical symptoms include: No ignition on demand; Flow-related error codes; Intermittent firing; No hot water on a combi. 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 Flow Switch Replacement in Greater Vancouver

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

Call (604) 359-1081 Request Service

The Flow Switch on Your Navien Boiler

The flow switch proves adequate water flow through the heat exchanger before the boiler is allowed to fire, protecting the exchanger from dry-firing and overheating. A stuck switch causes no-heat or no-hot-water faults.

On Navien systems — including models such as NCB-240E, NCB-210E, NHB-150 — a failing flow switch 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

Flow-fault codes with adequate pressure often mean a stuck flow switch or a fouled sensor.

Signs of a Failing Navien Flow Switch

No ignition on demand

Flow-related error codes

Intermittent firing

No hot water on a combi

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.