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The Bard 8402-079 limit control (Limit Contr. L200-160 Exp.Face.) is an OEM temperature safety switch used in Bard HVAC equipment to help prevent overheating conditions by opening the circuit when the set limit is reached, then allowing operation again after the temperature drops to the reset point. This exposed-face style control is commonly serviced when a unit is tripping on high limit, has nuisance shutdowns, or needs reliable temperature protection restored after years of heat cycling. For best results, confirm your unit model and wiring configuration, and match the original cut-out and reset temperatures so your Bard system maintains proper safety operation and dependable run time.