Bard 8402-031 Limit Switch Engineered for heavy-duty cycling

Engineered for heavy-duty cycling

What symptom indicates a failed damper door spring

the 221729A is for units without a display

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

For technicians working with the Maxitrol 220 series

Bard 8402-031 Limit Switch Engineered for heavy-duty cyclingThe 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