Lochinvar & A.O. Smith 100271886 Probe

The Lochinvar & A.O. Smith 100271886 Probe is a critical lower temperature probe designed for precise thermal monitoring in high-efficiency commercial gas water heaters. Engineered with an integrated connector, this replacement water heater sensor ensures seamless communication between the storage tank and the unit's control board. It is specifically compatible with Lochinvar Cyclone and A.O. Smith BTH 300A, 400A, and 500A models. As a veteran-grade HVACR part, the 100271886 manages real-time temperature data to prevent short-cycling and maintain optimal thermal stacking. This Lower Connector Probe features a robust thermistor housed in a corrosion-resistant casing, built to withstand the constant scaling and thermal stresses typical of high-demand potable water systems. When troubleshooting "E6" codes or fluctuating discharge temperatures, verifying the resistance of this OEM temperature sensor is a standard diagnostic step for any field technician. This component is essential for restoring factory-spec modulation and ensuring the safety of the domestic hot water loop.

• Precise accuracy: Delivers high-resolution feedback to the control module for tight temperature regulation and high-firing efficiency.
• Integrated design: Simplified wiring with a factory-molded integrated connector reduces installation time and minimizes high-resistance connection points.
• Model-specific compatibility: Directly replaces failed probes in A.O. Smith BTH-300A, 400A, and 500A gas water heater series.
• Heavy-duty construction: Designed for the "Lower" tank position where sediment and scale accumulation are most prevalent.

• Will this solve an "E6" or "Open Flue Sensor" error? While E6 often relates to flow or flue issues, a faulty lower temperature probe can cause erratic readings that mimic temperature differential errors. Always ohm out the probe to verify resistance against the manufacturer’s chart.
• Is this probe compatible with other series? This part is specifically engineered for the 100271886 catalog number. Check your specific unit serial number or technical manual to confirm the BTH-series compatibility.
• Does this include the O-ring or gasket? Generally, this probe is a plug-and-play assembly with the integrated connection, but technicians should always inspect the port seating for debris before insertion.

This item is not eligible for free shipping.

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.