HVACopediaNTI · Boiler
Lockout 123 Purge rate proving failed
What the control is telling you
Purge rate proving failed.
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
- Lockout 113 Flame circuit timeout
- Lockout 122 Light-off rate proving failed
- Lockout 122 Light off rate proving failed
- Lockout 123 Purge rate proving failed
- Lockout 138 Flame too low
- Lockout 143 Internal fault: Flame bias out of range 1
- Lockout 144 Internal fault: Flame bias out of range 2
- Lockout 145 Internal fault: Flame bias out of range 3
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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.
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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.