The Williams P296201 Switch is a mission-critical differential temperature switch designed specifically for Williams Forsaire Counterflow top vent and Magnum High Efficiency furnace models. This genuine OEM replacement part functions as a high-limit safety and blower control, featuring a fixed 165°F setpoint for circuit interruption or activation, with a precise 35°F differential. When the heat exchanger reaches the 165°F threshold, the switch engages or disengages as configured (on/off), reset occurs once the temperature drops 35°F below the limit, ensuring stable thermal regulation and preventing short-cycling. For service technicians, the P296201 provides a rugged SPDT contact configuration that supports various wiring requirements for industrial and residential HVAC units. The NEMA 1 enclosure protects the internal mechanism, while the design allows for seamless surface mount installation or 1/2-inch NPT alignment. Maintaining these HVAC temperature control parameters is essential for protecting the furnace from overheating and ensuring the blower fan activates only at optimal heat levels. Key Benefits Precise Thermal Management: Features a 165°F activation point with a 35°F reset differential for reliable furnace blower fan control. OEM Compatibility: Specifically engineered for Williams 5508, 6508, and 6008A series models to maintain factory specifications. Industrial-Grade Build: Enclosed in a NEMA 1 housing for enhanced durability in demanding mechanical environments. Versatile Wiring: The SPDT switch design allows for flexible application as either a high-limit safety or fan control component. Common Questions Is the Williams P296201 an auto-reset or manual reset switch? This specific limit switch operates with an automatic reset circuit; once the temperature drops below the 35°F differential, the contacts return to their original state. What furnace models are compatible with this selector switch? It is primarily utilized in Williams Forsaire Counterflow Top Vent (5508, 6508) and Magnum High Efficiency (6008A) series heaters. Can I use this as a replacement for different temperature ranges? No, for safety compliance and system efficiency, always match the original 165F 35F DIF specs. Using an incorrect differential can lead to heat exchanger damage or improper fan operation. 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.
