Takagi Condensing Code 741
Remote controller communication failure. The remote controller and the water heater are not communicating. It is a link fault rather than a failure of either end on its own.
Part replacementThe verdict
Replace a part
Often the cheapest fault in the table — the wiring between the two is as likely as either device. Rarely dangerous, but the unit is hard to control until it is fixed.
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 Condensing — not averaged across the brand.
Source: Takagi Condensing Models On-Demand Water Heater Troubleshooting Guide (p. 13), read Aug 2026 — the manufacturer's own documentation for this exact series.
What you can safely check
- Note whether the remote display is blank, frozen, or showing nonsense.
- Note any recent work near the wiring between the remote and the unit.
- Book a service call.
Frequently asked questions
Is this the same as 761?
No. 741 is the remote controller; 761 is Easy-Link, the communication between multiple water heaters. One is your control panel, the other is unit-to-unit.
Code 741 on other Takagi series
Other Takagi series report code 741 under the same fault name, but each manual is transcribed separately and they do not read alike:
Don't confuse this with
One other Takagi Condensing code points at a link between two boards too. They are the same symptom reported from a different place in the unit, so which one the display shows is what tells you where to look: