NTI Boiler: Blower runs at high speed with burner off
Blower runs at high speed with burner off on a NTI boiler: Blower will not idle down in standby.
Applies to: Trinity Tft60, Tft85, Tft110, Tft154, Tft201, Tft285, Tft340, Tft399
Common causes of blower runs at high speed with burner off
- Blower signal cable disconnected
- No 24 VAC to the control
How to fix blower runs at high speed with burner off: step by step
- Check the 5-position Molex on the blower and the 4-position Molex on the control
- Check the control power LED and fuse C
- Measure 24 VAC at J8 pins 1 and 2
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.