HVACopediaNTI · Boiler
Hold / Lockout 128 Fan speed failed during pre-purge
What the control is telling you
Fan speed failed during pre-purge.
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 99 CH max modulation rate was > absolute max rate
- Hold / Lockout 105 Flame detected out of sequence
- Hold / Lockout 105 Flame detected out of sequence
- Hold / Lockout 128 Fan speed failed during pre-purge
- Hold / Lockout 129 Fan speed failed during pre-ignition
- Hold / Lockout 129 Fan speed failed during pre-ignition
- Hold / Lockout 13 Internal fault: PII shorted to ILK
- Hold / Lockout 13 Internal fault: PII shorted to ILK
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 Trinity Tft399 Installation and Operation Manual (2018-09-07), Sec. 16.0 Troubleshooting, Table 16-3. 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.