Bradford White 239-45166-00 Limit Switch

The Bradford White 239-45166-00 Limit Switch is a critical safety component designed for precise thermal management within Icon System gas water heaters. This fixed temperature limit switch, often designated as an L155-35F sensor, is engineered to open at 155°F and automatically reset once temperatures drop by a 35°F differential. Built for compatibility with Bradford White Defender Safety System models, this replacement thermal switch monitors internal temperatures to prevent overheating and potential flammable vapor ignition. Contractors frequently source this part for RG250S6N and RG240T6N series units to resolve common pilot light outages or recurring water heater lockout codes. Integrating this OEM limit switch ensures the combustion chamber operates within manufacturer parameters, maintaining the integrity of the thermal well assembly and ensuring reliable HVAC burner sequencing during high-demand cycles.

• Precise Thermal Calibration: Calibrated to trigger at 155°F with a 35°F reset differential for stable performance.
• OEM Compatibility: Designed specifically for Bradford White Icon System gas valves and Defender series water heaters.
• Safety Compliance: Functions as a primary high-limit safety cut-out to prevent overheating conditions.
• Durable Construction: Built to withstand the high-ambient temperatures of modern sealed combustion chambers.

Common Technical Questions

What are the symptoms of a failing limit switch?
A tripped or faulty limit switch typically results in the gas valve shutting down, leading to a pilot that will not stay lit or specific LED error codes on the Bradford White Icon System controller.

Is this switch manually resettable?
No, the 239-45166-00 is an automatic reset switch. It will close the circuit once the temperature falls below the 120°F threshold (155°F minus the 35°F differential).

Will this part fit other water heater brands?
This component is specifically designed for Bradford White 239-45166-00 requirements. Cross-referencing technical specifications is mandatory before attempting installation on non-Bradford White units.

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.