Lochinvar & A.O. Smith 100208623 Wiring Harness

As a seasoned technician, you know that a reliable ignition sequence is the backbone of any high-efficiency system. The Lochinvar & A.O. Smith 100208623 Wiring Harness is the critical electrical link between the integrated Smart System control board and the spark electrode. This OEM spark electrode wiring harness is specifically engineered for Knight XL boiler models KBN600 through KBN800, ensuring the high-voltage pulse reaches the electrode without impedance or signal leakage. Measuring 42.5 inches with a 3/16-inch terminal size, this harness utilizes a female X spark plug connection to maintain a secure, vibration-resistant fit within the combustion chamber. Whether you are dealing with a Lochinvar Knight boiler or a compatible A.O. Smith unit, this assembly serves as a direct, drop-in replacement for obsolete part numbers WRE2230, WRE2230K, and 100173105. Replacing a brittle or carbon-tracked ignition cable with this genuine Lochinvar 100208623 component is the most effective way to resolve intermittent "no-flame" errors and ensure consistent seasonal performance.

• Direct OEM Compatibility: Ensures a precise fit for Knight XL KBN600-800 series and compatible A.O. Smith heating systems, eliminating the need for field modifications.
• High-Temp Insulation: Featured heat-resistant wiring protects against the extreme thermal cycles of high-efficiency condensing boilers.
• Reliable Ignition: Optimizes spark generation for uniform combustion and prevents control module lockouts caused by signal loss.
• Simplified Service: Pre-terminated female connectors allow for rapid removal and installation during routine maintenance or emergency boiler troubleshooting.

What are the signs of a failing 100208623 harness?
Technicians often see "Trial for Ignition" failures or "Flame Detection" errors on the Smart System display. Visually, look for cracked insulation or corrosion at the spark plug terminal which causes high-voltage arcing to the boiler chassis instead of the electrode.

Can I use this on the smaller Knight WH series?
This specific 42.5-inch harness is designed for the larger Knight XL (KB600-801) chassis. Always verify your specific Lochinvar replacement part number in the service manual, as lead lengths vary significantly between wall-mount and floor-standing units.

Does this harness include the spark electrode?
No, this is the spark electrode wiring harness only. If the ceramic insulator on the electrode is cracked, it should be replaced as a separate component to ensure the entire ignition circuit is up to spec.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.