Brand guide
All Takagi water heater guides
Choose the symptom or code that matches your unit. Confirm the exact model and control generation against the rating plate before following model-specific instructions.
How to Reset a Takagi Tankless
Reset a Takagi once after you fix the cause — power off 10–30 seconds. Do not reset a 13 remaining-flame or a flooded burner.
Pilot and ignition problemsTakagi Code 111: Ignition Failure
Takagi code 111 means ignition failure after three tries. Common causes like a closed gas cock or dirty flame rod, a safe reset, and next steps.
Leaks and floodingTakagi Tankless Leaking: Find the Source
Water under a Takagi can be condensate, relief valve discharge, an O-ring at the filter or water valve, or the heat exchanger. How to tell.
No hot waterTakagi Tankless Problems: Codes & Fixes
Takagi tankless not heating? Most lockouts are air or exhaust faults (10), ignition or flame loss (11/12), or overheating from scale (14/16).
Unusual noisesTakagi Tankless Vibration Under Fire
A Takagi that rattles while firing is usually scale in the heat exchanger, the combustion fan, a recirculation pump, or rigid mounting.
No hot waterTakagi Tankless Water Heater Not Heating
A Takagi tankless that will not heat needs flow, power, gas, ignition, or scale checks. Photograph the code.