SWT01635 Furnace Limit Switch - for Trane Furnace Part Replaces C340366P06-3" Main Limit Switch Rated at 180 Degrees (L180-30F)

This furnace limit switch is engineered to deliver reliable thermal protection and seamless integration into residential heating systems. Acting as a critical safety component, it monitors furnace temperature and automatically disconnects the burner when unsafe heat levels are detected, preventing equipment damage and mitigating fire risks. The switch’s precision calibration ensures consistent performance across varying operating conditions, restoring optimal safety to aging or faulty furnaces. Crafted for universal compatibility, it replaces worn-out switches in most gas, electric, or oil-based systems. The compact yet rugged construction utilizes heat-resistant alloys and ceramics to withstand temperatures exceeding standard operational limits, ensuring longevity even in high-stress environments. Installation is streamlined for DIY efficiency: disconnect the existing wiring, remove the mounting screws, align the new switch, and reconnect the terminals—typically completed within minutes. The hermetically sealed design prevents dust infiltration and moisture damage, reducing maintenance needs. Homeowners will appreciate its role in eliminating erratic shutdowns, uneven heating, or burner failure caused by degraded switches. For HVAC technicians, it offers a cost-effective solution to extend furnace lifespan without full system replacements. This component is indispensable for maintaining safe, efficient home heating—ideal for those prioritizing system reliability and proactive hazard prevention.

• Partial List of Furnaces that use this Limit:ADC080C942B2 ADC080C942B3 ADC080C942B4 ADC080C942B6 ADC080C942B7 ADC080C942B8 ADC080C942BA ADC120C960A0 ADC120C960A1 ADC120C960B0 ADC120C960B1 ADC120C960B3 ADC120C960B4 ADC1B080A9421AA ADC1B080A9421AB ADC1C100A9481AA ADC1C100A9481AB ADH1B065A9421AA ADH2B080A9V3VAA ADH2B080A9V3VAB ADH2B080A9V3VAC ADH2B080A9V3VAD ADH2B080A9V4VAC ADH2C100A9V4VAA ADH2C100A9V4VAB ADH2C100A9V4VAC ADH2C100A9V4VAD ADH3B080ACV3VAA ADH3B080ACV3VAB ADH3C100ACV4VAA ADH3C100ACV4VAB ADHMB080ACV3VAA ADHMB080ACV3VAB ADHMC100ACV4VAA ADHMC100ACV4VAB ADX080C942B2 ADX080C942B3 ADX080C942B4 ADX080C942C0 ADX080C942C1 ADX080C942C2 ADX080C942C3 ADX080C942D0
• Precise Temperature Regulation: Automatically cuts power when overheating occurs, protecting furnace components from damage.
• Universal Compatibility: Designed to fit most residential furnaces for effortless replacement without modifications.
• Robust Thermal Endurance: High-grade materials resist warping or failure under extreme continuous heat exposure.
• Function:A limit switch is a safety device designed to shut down a piece of equipment. Limits have a set point, which is in some cases, adjustable. The set point prevents the temperature or pressure from exceeding the rating of the switch.
• Simplified Installation: Direct replacement with standard wiring connections, requiring no specialized tools.