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The Bard 8201-022 blower relay is an OEM electrical control component used in Bard wall mounted air conditioners and heat pump package units to let a low voltage call from the thermostat or control board safely switch the higher load circuit that powers the indoor blower motor. If your unit has an intermittent fan, a blower that will not start, or a blower that stays on when it should not, replacing the relay with the correct Bard part number helps restore proper fan operation and protects the control circuit from overheating or contact damage. Confirm the part number against your unit model and wiring diagram before ordering, since relay style and coil ratings can vary by series and revision.