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The Bard 8402-195 is an OEM limit control used in Bard wall-mounted HVAC equipment to protect the heating section by opening the control circuit when abnormal temperatures are reached, helping prevent overheating damage and nuisance failures. This safety switch is commonly referenced as a 130P/150BU limit control and is intended to restore factory temperature-safety operation when the original control is worn, out of calibration, or has failed. Confirm fit by matching the part number 8402-195 and the limit control rating called out on your unit wiring diagram or service manual before ordering.