or high-efficiency gas furnace

Its Open on Rise switch action ensures immediate contact separation whenever thermal thresholds are exceeded

Always replace with the exact OEM-specified temperature rating

preventing voltage leaks and ensuring a consistent spark in high-humidity environments up to 95% RH

The Weil McLain 383-500-300 is an OEM-spec Return/Supply Water Sensor designed for precision temperature regulation within hydronic systems

Nordyne 626424R Limit Switch or high-efficiency gas furnaceThe Nordyne 626424R Limit Switch is a critical safety component designed for high demand HVAC applications. This OEM Nordyne replacement part features a 3 1 8 inch insertion depth and is specifically calibrated for an operating range of 155? F to 175? F. As an automatic reset limit switch, the circuit is engineered to open when the temperature reaches the 175? F threshold and close once it cools back down to 155? F, protecting the heat exchanger from