Bard 8402-031 Limit Switch Ensure the ceramic insulator is

Ensure the ceramic insulator is intact during installation to prevent grounding issues that lead to intermittent furnace short cycling

Always check your specific model’s parts list to confirm it requires a #42 orifice

It is designed to automatically re-engage the circuit once the internal temperature falls roughly 20°F below the trip point

utilizing this HVAC ignitor replacement ensures electrical compatibility with the furnace control board’s voltage output

leak-free mechanical connection to the safety shut-off valve

Bard 8402-031 Limit Switch Ensure the ceramic insulator isThe Bard 8402 031 Limit Switch is a critical safety component designed for high limit temperature regulation in Bard HVAC systems and wall mount units. Engineered for precise thermal monitoring, this OEM replacement limit switch features a fixed set point that shuts down the heating circuit when internal temperatures reach 155F (Open), preventing heat exchanger damage and system overheating. Once the unit cools to 130F (Closed), the switch resets the