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Bard part number 9043-308 is an OEM auxiliary limit switch used in Bard wall mount and packaged HVAC equipment to open or close a safety or control circuit when a specific temperature or operating limit is reached. Techs commonly rely on this style of limit switch to help protect the unit from overheating conditions and to support proper sequence of operation during heating. If you are replacing a failed or nuisance tripping limit, using the correct Bard 9043-308 (auxiliary limit switch 4034703) helps maintain factory-intended control logic and dependable system protection. Always confirm fit by matching the part number to your unit model and wiring diagram before installation.
* Orders less than $50 may incure a minimum order fee.