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This is the factory OEM high pressure switch (part number HK02ZA395) for the Carrier PY2PEB042060NB packaged unit. The high pressure switch is a critical refrigerant-side safety device that monitors compressor discharge pressure. When the refrigerant pressure rises above the factory cutout threshold, the switch opens the control circuit, shutting down the compressor to prevent catastrophic damage. Common failure symptoms include nuisance high-pressure lockouts, a compressor that won't restart without a manual reset, or fault codes indicating a high-pressure trip — even when system pressures appear normal at the service gauges.
Compatibility: Direct OEM replacement for Carrier model PY2PEB042060NB packaged units. Also replaces legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, and HK02ZA401. Verify the PSI rating on your existing switch's data label before ordering. Questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and we'll ship the right part fast.