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Bard 8406-135BX is an OEM low pressure switch set to open at 14 PSIG to protect the refrigeration circuit on compatible Bard wall-mount and packaged HVAC equipment. When suction pressure drops too low, this safety control helps prevent nuisance damage by interrupting operation and prompting diagnosis of issues such as low refrigerant charge, airflow problems, or a restriction. Replacing a suspect or out-of-calibration switch with the correct Bard part restores proper low-pressure safety operation and helps keep the system running within intended limits; always confirm application by matching the part number to your unit model and the wiring connections before installation.
* Orders less than $50 may incure a minimum order fee.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.