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The Bard 910-1979 sensor assembly is an OEM temperature sensing component used in Bard wall mounted HVAC equipment to provide accurate temperature feedback to the unit controls for proper staging, protection logic, and overall system operation. When a temperature sensor drifts out of range, opens, or shorts, Bard units can show erratic operation, nuisance faults, or poor comfort control, so replacing it with the correct Bard 910-1979 helps restore dependable readings and ensures the control board makes the right decisions. Match this part number to your unit model and service literature to confirm the correct sensor location and connector style before ordering.