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you must adjust the manifold pressure or use de-rated orifices to compensate for the thinner air density and ensure safe furnace operation
it guarantees correct mounting hole alignment and electrical terminal spacing
this thermal link interrupts the electrical circuit to prevent component failure or hazardous operating conditions
ensuring the automatic reset function restores system operation once internal temperatures return to a safe operating range
Bard 8402-031 Limit Switch you must adjust the manifoldThe 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