Takagi Error Code 610: Fan Motor Fault

Severity
Warning
Type
digital display
Estimated repair cost: $250 — $600 (parts + labor)
Warning: Your Takagi tankless water heater has detected a problem with its fan motor and has shut down to prevent further issues. You will have no hot water until this is resolved.

How to Fix Takagi Code 610

  1. Step 1: Check the vent termination outside your home to ensure it's clear of any obstructions like snow, ice, leaves, or debris.
  2. Step 2: Reset the unit by turning off the power to the water heater at the breaker for 30 seconds, then turn it back on. This may clear a temporary fault.
  3. Step 3: If the error persists after checking the vent and resetting the unit, contact a qualified HVAC technician to diagnose and repair the problem.

How to Reset Takagi Code 610

  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 610 mean?

The Takagi error code 610 indicates a fault within the fan motor or its control circuit. The fan motor is responsible for exhausting combustion gases safely outside your home. When the system detects that the fan isn't operating correctly (either not spinning at the right speed or not spinning at all), it shuts down to prevent a potentially dangerous buildup of carbon monoxide.

This error can stem from a few different issues, ranging from a simple wiring problem to a complete fan motor failure. Because the fan is so important for safe operation, the unit locks out and displays this error code, preventing further operation until the problem is resolved. It's important to address this promptly to restore hot water and ensure safe operation of your water heater.

Affected Models

Replacement Parts

PartOEM NumberEst. Cost
Fan Motor — —
Control Board — —
Vent pressure sensor — —

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