The Nordyne 626461R Limit Switch is a critical OEM furnace safety switch engineered for over-temperature protection in residential and light commercial HVAC systems

Optimized Refrigerant Control: Calibrated internal diameter for consistent mass flow rates

Engineered for Armstrong and Air Ease furnaces

An "open" reading under 165°F indicates a failed switch

For automatic changeover applications

Lennox 51W92 Pressure Switch The Nordyne 626461R Limit SwitchWhen you're dealing with a Lennox furnace that won't cycle past the inducer stage, the Lennox 51W92 Pressure Switch is the primary diagnostic point for proving draft. This genuine OEM Lennox 51W92 is a single pole, single throw (SPST) normally open switch calibrated to close at 1. 00" WC. Engineering wise, this component is critical for 80% and 90% AFUE mid to high efficiency gas furnaces, ensuring that the combustion blower is moving enough air to