OEM Carrier High Pressure Switch 670/470 PSI for Model PH3ANA036000BCAA

This is the genuine OEM high pressure switch (part# 312926-252), factory-specified for the Carrier PH3ANA036000BCAA packaged heat pump unit. The high pressure switch is a critical refrigerant-circuit safety device that continuously monitors discharge-side refrigerant pressure. When system pressure exceeds the factory-set trip point of 670 PSI, the switch opens the control circuit, shutting down the compressor to prevent catastrophic refrigerant-side damage. It automatically resets at 470 PSI. Common failure symptoms include nuisance high-pressure lockouts, compressor short-cycling, or the unit failing to maintain cooling or heating with a fault code logged on the control board.

• Specs: Trip pressure 670 PSI (cut-out) | Reset pressure 470 PSI (cut-in) | Genuine Carrier OEM part | Certified to EN12263 and EN60730-2-6 standards | Factory Authorized Parts designation
• OEM vs Generic: OEM pressure switches are factory-calibrated to exact cut-out and reset tolerances. Off-brand substitutes frequently drift outside spec, causing either nuisance trips or — worse — failing to protect the compressor at true over-pressure events.
• Install difficulty: 3/5 — System refrigerant must be recovered before replacing this switch. Tools required: manifold gauge set, refrigerant recovery unit, adjustable wrench, leak-detection solution. Always verify refrigerant charge after reinstallation. Licensed HVAC technician strongly recommended.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier PH3ANA036000BCAA packaged heat pump. Verify the part number on the existing switch's label before ordering — the 312926-252 is specific to the 670/470 PSI pressure rating. Our fitment team is available to confirm compatibility before you order. Order today for same-day shipping.