Reliable Heating and Cooling Solutions – Quality Service, Fair Prices, Guaranteed Satisfaction!

Follow Us On:

Logo
Contact US!

NTI Boiler: Power-on and operating modes

Updated · by Aurora Star Tech Inc.

Power-on and operating modes on a NTI boiler: After power-on the display shows the current mode: standby, CH request (supply temperature shown), DHW request (DHW setpoint shown), purging cycle, or post circulation on the CH or DHW circuit.

Homeowner with a boiler problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Applies to: TRX150

How to fix power-on and operating modes: step by step

  1. Press the ON/OFF button to power on the boiler.
  2. Read the mode shown on the display.
  3. If a purge or post circulation is showing, wait for it to finish before judging the system.
Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

If the unit shows an error code, look it up: NTI Boiler codes

Models

TRX085TRX110CTRX150TRX199TRX199C

More commissioning tips for boiler

Source: NTI TRX150 manual, p. 63. 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.

© 2026 Aurora Star Tech Inc. All rights reserved. This page may not be copied, republished or used to train other systems without written permission.

Emergency Boiler Repair

647-657-2977