HVACopediaNTI · Boiler
Alert 25 Lead Lag operation switch was turned OFF
What the control is telling you
Lead Lag operation switch was turned OFF.
Applies to: Trinity Tft60, Tft85, Tft110, Tft154, Tft201, Tft285, Tft340, Tft399
Models that show this code
13 models in Trinity Tft
Other codes on the same units
- Alert 247 CH time of day set point was invalid
- Alert 248 CH outdoor temperature invalid
- Alert 248 CH outdoor temperature invalid
- Alert 249 CH ODR time of day setpoint was invalid
- Alert 250 CH ODR time of day set point exceeds normal set point
- Alert 251 CH max outdoor set point was invalid
- Alert 252 CH min outdoor setp oint was invalid
- Alert 253 CH min water set point was invalid
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Source: NTI Trinity Tft399 Installation and Operation Manual (2018-09-07), Sec. 16.0 Troubleshooting, Table 16-4. Summarized in our own words; check the original manual for your model.
Homeowner looking at this code? See what it means for you and when to call a technician.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.