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The Bard 8201-031 is an OEM compressor fault relay used in Bard wall mounted HVAC equipment to monitor for abnormal compressor operating conditions and provide a fault signal that helps protect the compressor circuit from continued operation during a problem. When this relay detects or receives a fault condition, it changes state to support shutdown, alarm, or lockout functions depending on the unit controls, helping prevent repeat trips and costly compressor damage. If you are troubleshooting nuisance lockouts, no compressor operation, or intermittent fault indications, replacing the Bard 8201-031 with the correct OEM relay is a solid first step after confirming the underlying cause and verifying wiring and control inputs match the unit schematic.
* Orders less than $50 may incure a minimum order fee.