Description
The NTI Boiler 6000086426 is an OEM replacement wire harness engineered specifically for NTI’s TFT series boilers, including the TFT 154, TFT 300, TFT 340, and TFT 399 FP models. Designed to restore proper electrical connectivity and ensure safe, dependable boiler operation, this harness is the factory-correct solution for technicians servicing NTI high-efficiency condensing boilers.
Product Overview
This wire harness serves as a critical electrical interconnect within the TFT series boiler system, linking control boards, sensors, and operational components. Using the OEM part ensures full compatibility and eliminates the guesswork associated with aftermarket alternatives.
Compatible Models
- NTI TFT 154 FP
- NTI TFT 300 FP
- NTI TFT 340 FP
- NTI TFT 399 FP
Key Features
- OEM NTI Boiler replacement part — guaranteed fit and function
- Designed for TFT series high-efficiency condensing boilers
- Restores proper electrical connections between boiler control components
- Supports reliable ignition, sensor, and control board communication
- Durable construction built to withstand the demands of boiler environments
Why Choose OEM?
Using a genuine NTI replacement wire harness ensures that all electrical pathways meet the original design specifications of your TFT series boiler. This minimizes the risk of nuisance faults, control board damage, or unsafe operation that can result from incompatible aftermarket wiring. For HVAC professionals and service technicians, specifying OEM parts is the most reliable path to a first-time fix.
Part Information
- Brand: NTI Boiler
- Part Number: 6000086426
- Part Type: Wire Harness / Wiring Assembly
- Application: TFT 154, 300, 340, 399 FP Series Boilers







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