Takagi tankless water heater code 761
Easy-Link communication failure. Code 761 means the same thing on all 2 Takagi series documented here — but the fix, and what it costs, is still worth reading for your exact unit.
What code 761 means on each Takagi series
| Series | What it means | Verdict | Typical cost |
|---|---|---|---|
| Condensing | Easy-Link communication failure | Call a pro | $0–$500 |
| Non-Condensing | Easy-Link communication failure | Call a pro | $0–$500 |
Each row opens the full page for that generation. We hold manuals for Condensing and Non-Condensing, and each one gets its own reading of code 761 — what Takagi documents, what you can safely check yourself, and what the repair should cost.
What each manual actually says
The table above compares 2 series in four columns, which is enough to route you and not enough to explain anything. This is the Takagi wording behind each row, one entry per manual, so you can see where the 2 readings of code 761 agree and where they part company.
Condensing — Easy-Link communication failure
Easy-Link is Takagi's system for linking several water heaters to work together, with one master and the rest as slaves. This code reports a communication failure across that link. On a single-unit installation it should not appear.
Non-Condensing — Easy-Link communication failure
Easy-Link is Takagi's system for linking several water heaters to work together. This code reports a communication failure across that link, and Takagi lists it for the three-digit display only. On a single-unit installation it should not appear.
Does it matter which Takagi you have?
Condensing and Non-Condensing all route code 761 the same way: a professional, at $0–$500. That makes it one of the Takagi numbers you can act on before working out which unit you own.
What to check first, whatever your series
These checks are on the manufacturer's list for every Takagi series that reports code 761, so they are safe to work through before you have identified your exact unit. They also cost nothing.
- Note how many units are linked and whether they all show the code.
- If a unit was recently added, replaced, or rewired, contact that installer.
- Do not open the units to change switch settings yourself.
That is 3 of the 3 checks documented for code 761. The rest differ by generation, so if none of those explains it, go to your own series above.
Which Takagi do you have?
On the 2 series that report code 761, the model number on the rating label starts T — match yours against the 3 listed below. You can also use the full model-number decoder.
Where this comes from
Source: Takagi Condensing Models On-Demand Water Heater Troubleshooting Guide (p. 13), read Aug 2026 — the manufacturer's own documentation for this Takagi range.
Source: Takagi Non-Condensing Models On-Demand Water Heater Troubleshooting Guide (p. 12), read Aug 2026 — the manufacturer's own documentation for this Takagi range.
Parts, guides and symptoms behind code 761
Code 761 on these 2 Takagi series points at 1 part, each named by the manufacturer's own procedure for this code.