Takagi Non-Condensing Code 441
Flow sensor fault (Easy-Link systems). The flow sensor is not reporting correctly. On this range Takagi marks the code as Easy-Link system only — it belongs to multi-unit installations rather than a single heater.
Part replacementThe verdict
Replace a part
A moderate part with a clear diagnosis. Before it is condemned, a technician will check that debris is not stopping the turbine spinning — which is what the inlet filter exists to prevent.
Typical cost: $150–$500
US estimate for parts and labor. Prices vary by region and by who does the work — see how we estimate costs.
What the manual says
The meaning above is transcribed from the manufacturer's diagnostic documentation for the Non-Condensing — not averaged across the brand.
Source: Takagi Non-Condensing Models On-Demand Water Heater Troubleshooting Guide (p. 12), read Aug 2026 — the manufacturer's own documentation for this exact series.
What you can safely check
- Note how many units are in the system and which one is reporting.
- Book a service call.
Frequently asked questions
I have a single water heater and I am seeing 441.
Takagi lists this code for Easy-Link systems on the non-condensing range, so a single unit reporting it is worth mentioning as-is when you call. On the condensing range, 441 is a plain flow sensor code with no such restriction.
Code 441 on other Takagi series
The same code number can mean something different on another series — make sure you're reading the page for your exact unit: