NTI Boiler: Burner not running on a call for heat
Burner not running on a call for heat on a NTI boiler: Heat call present but the boiler is not firing.
Applies to: Trinity Tft60, Tft85, Tft110, Tft154, Tft201, Tft285, Tft340, Tft399
Common causes of burner not running on a call for heat
- Demand already satisfied
- Outlet temperature above setpoint minus on-hysteresis
- A hold, delay or lockout is active
- Burner switch is off in the controller
- Safety setting changed and not yet verified (Lockout 2)
How to fix burner not running on a call for heat: step by step
- Check Demand and setpoints on the touchscreen
- Check thermostat and DHW aquastat settings
- Read the Summary page for any Hold, Delay or Lockout code
- If Demand says burner switch off, go to the diagnostics burner test page and turn it on
- For Lockout 2 complete the safety data verification
If the unit shows an error code, look it up: NTI Boiler codes
Models
Tft60Tft60Tft85Tft85Tft110Tft110Tft154Tft155Tft175Tft200Tft201Tft250Tft285Tft300Tft340Tft399Tft399
Source: NTI Trinity Tft399 Installation and Operation Manual (2018-09-07), Sec. 16.0 Troubleshooting. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.