HVACopediaNTI · Boiler
Alert 311 Run was terminated due to interrupted air flow switch was off
What the control is telling you
Run was terminated due to interrupted air flow switch was off.
Applies to: Trinity Tft60, Tft85, Tft110, Tft155, Tft175, Tft200, Tft250, Tft300, Tft399
Models that show this code
13 models in Trinity Tft
Other codes on the same units
- Alert 309 Abnormal Recycle: ILK off during Ignition period
- Alert 31 Program Module (PM) was inserted into socket
- Alert 31 Program Module (PM) was inserted into socket
- Alert 310 Run was terminated due to ILK was off
- Alert 312 Stuck reset switch
- Alert 313 Run was terminated due to fan failure
- Alert 314 Abnormal Recycle: Fan failed during Drive to Purge Rate
- Alert 315 Abnormal Recycle: Fan failed during Measured Purge Time
Save it for the next call
Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.
Source: NTI Tft60-399 Installation and Operation Instructions (rev. 2012-04-09), Sec. 15.0 Troubleshooting, Table 15-4. 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.