Reznor 50418 Limit Switch This is a 1-pole model

This is a 1-pole model with a shunt/jumper configuration

making it the standard choice for professional HVAC mechanical linkages requiring offset mounting or specific stroke adjustments

improper flame impingement (the tip should be immersed 1/2 inch into the flame)

This ignitor is the standard replacement for 025-27731-702

offering essential protection against environmental debris and tampering

Reznor 50418 Limit Switch This is a 1-pole modelThe Reznor 50418 Limit Switch is a critical OEM safety component engineered for Reznor HVAC equipment, specifically compatible with models like the UA100. This 125 145F auto limit switch functions as a high limit safety cut off, monitoring internal heat exchanger temperatures to prevent hazardous overheating. When the temperature exceeds the factory calibrated 145F threshold, the switch opens the electrical circuit to the gas valve, immediately