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Bard part number 8620-080 is an OEM fan and limit control kit used to manage blower operation and provide temperature based safety limiting in compatible Bard HVAC equipment. This control helps the system respond correctly as temperatures rise and fall by signaling the fan to run when needed while protecting the unit from overheating conditions that can lead to nuisance trips or component damage. If you are troubleshooting fan sequencing issues, intermittent shutdowns, or repeated limit events, replacing the factory specified Bard 8620-080 with the correct OEM kit is a reliable way to restore proper operation and ensure the control matches the original wiring and temperature function required by the unit.