Takagi Error Code 760: Communication Error

Severity
Warning
Type
digital display
Estimated repair cost: $300 — $650 (parts + labor)
Warning: Your Takagi tankless water heater has stopped working due to a communication error. This means you won't have hot water until it's fixed.

How to Fix Takagi Code 760

  1. Step 1: Turn the unit off and then back on again. This might reset the system and clear a temporary glitch.
  2. Step 2: Check the power to the unit. Make sure the breaker hasn't tripped. Reset it if necessary.
  3. Step 3: If the error persists after resetting the unit and confirming power, call a qualified HVAC technician to diagnose and repair the problem.

How to Reset Takagi Code 760

  1. Turn off the unit using the power button on the front panel.
  2. Turn off the gas supply valve.
  3. Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
  4. Restore power at the breaker, then open the gas valve.
  5. Turn the unit back on. If the error returns, the underlying issue needs repair.

What does 760 mean?

The Takagi error code 760 indicates a communication problem within the unit's electronic components. Essentially, the different control boards inside your tankless heater aren't talking to each other properly. This could be a problem with the wiring harness, one of the control boards, or even the main CPU. When this happens, the unit shuts down as a safety measure to prevent potential damage or unsafe operation. It's like a computer crashing because the parts inside can't communicate.

Because tankless heaters rely on precise electronic control for ignition, water temperature regulation, and safety monitoring, a communication breakdown prevents the heater from operating. It's not something you can easily bypass, and it requires troubleshooting by a qualified technician to pinpoint the exact cause and replace any faulty components.

Affected Models

Replacement Parts

PartOEM NumberEst. Cost
Main Control Board — —
Wiring Harness — —
Combustion Control Board — —

Related Codes on Same Models

CodeDescriptionSeverity
101 Combustion Abnormality Critical
111 Ignition Failure Critical
121 Flame Failure Critical
200 Overheating Warning
207 Bypass Valve Error Warning
291 Flow Rate Issue Warning
312 Outlet Temp Sensor Warning
321 Inlet Temp Sensor Warning
391 Exhaust Temp Sensor Warning
510 Gas Solenoid Valve Critical