Can you replace the flow sensor on my Navien boiler?

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

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

Typical symptoms include: No hot water on demand; Unit fires with no draw; Fluctuating hot-water temperature; Flow error codes. On Navien boilers this can also show as E003 Ignition Failure or E012 Flame Loss. We confirm the diagnosis before any work.

Navien · Controls & Sensors

Navien Flow Sensor Replacement in Greater Vancouver

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

Call (604) 359-1081 Request Service

The Flow Sensor on Your Navien Boiler

The flow sensor measures domestic hot-water flow so a tankless or combi unit knows when to fire and how hard. Scale and debris are the usual enemies, causing no hot water or false activation.

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

Controls & Sensors

Safety Warning

No hot water despite good mains flow often traces to a scaled flow sensor — descaling and water treatment help.

Signs of a Failing Navien Flow Sensor

No hot water on demand

Unit fires with no draw

Fluctuating hot-water temperature

Flow error codes

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.