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Status Diagnostics: Integrated dual-color LED provides immediate visual feedback for normal operation
Engineered for general service applications
Automatic Reset Functionality: Closes the circuit automatically at 125°F
making it suitable for steam and hot water applications
optimized for powering furnace control boards and 24VAC accessories
Lochinvar & A.O. Smith 100109934 Switch Refrigerant Status Diagnostics: Integrated dual-color LEDThe Lochinvar & A. O. Smith 100109934 Switch is a critical safety component engineered for high efficiency condensing boilers and commercial water heaters. Functioning as a blocked outlet switch, this normally closed (NC) pressure sensor is calibrated to 2. 6" WC to monitor exhaust backpressure. If the venting system becomes obstructed by debris, ice, or mechanical failure, the 100109934 triggers an immediate system lockout to prevent the hazardous
