Guides Compare
Takagi Error Code

Takagi Error Code 111 — Causes & Fix

Code 111 is "no ignition" on Takagi. Diagnostic sequence.

More Takagi
All Takagi Takagi Water Heater Warranty Takagi Water Heater Troubleshooting Takagi Water Heater Error Codes Takagi Water Heater Manuals Takagi Water Heater Customer Service How to Install a Takagi Water Heater Takagi Water Heater Maintenance Schedule How to Flush & Descale a Takagi Water Heater Takagi Water Heater Age Lookup Takagi Water Heater Recirculation
Updated May 2026 · Takagi Water Heaters

Code 111 = Ignition failure / no flame. The highest-volume Takagi error code.

Diagnostic sequence

1. Gas supply

  • Confirm gas valve at unit is fully open
  • Test another gas appliance
  • Check propane tank level if LP

2. Air in gas line

If gas was recently turned off, purge by running another appliance for 5-10 min.

3. Gas pressure

Takagi needs 4" WC NG / 10" WC propane minimum. Undersized gas line is the #1 chronic cause.

4. Flame rod (#1 hardware cause)

Cleaning resolves about 40% of chronic Code 111 cases. See flame rod.

5. Igniter

Direct spark igniter wears out. Check for spark in a dark room. See igniter.

6. Gas valve

Stuck-closed solenoid. Dealer-only replacement.

Reset

  1. Address suspected cause
  2. Press On/Off on controller
  3. If code returns, escalate

Bottom line

Top-down diagnostic. Flame rod cleaning is free and resolves a meaningful fraction.