NTI 6000086426 TFT 154/300/340/399 Flame Probe Wiring Harness

The NTI 6000086426 is an OEM replacement flame probe (FP) wiring harness designed for use with NTI Trinity TFT series condensing boilers. This harness provides the critical electrical connection between the flame probe (ionization electrode) and the boiler control board, enabling accurate flame detection and safe burner operation.

This is a genuine NTI replacement part, also known by short part number 86426, engineered to meet the original factory specifications of the TFT series. Using an authentic OEM harness ensures reliable signal integrity and proper communication with the boiler's ignition and safety control system.

Key Features:

• Genuine OEM NTI replacement flame probe wiring harness
• Designed for NTI Trinity TFT series condensing boilers
• Connects the flame probe/ionization electrode to the boiler control board
• Ensures accurate flame sensing for safe burner operation and lockout protection
• Direct factory-fit replacement — no modification required
• Also referenced as NTI part number 86426

The NTI Trinity TFT series is a high-efficiency condensing boiler platform with up to 95% AFUE and a 10:1 turndown ratio, serving both residential and light commercial applications. Replacing a faulty or damaged flame probe harness restores proper ionization signal detection and helps prevent nuisance lockouts or unsafe operating conditions.