OEM Carrier High Pressure Switch 312926-252 (670-470#) for Model PH3ANA030000BBAA

This is the genuine OEM Carrier high pressure switch (part number 312926-252), factory-specified for the Carrier PH3ANA030000BBAA packaged heat pump system. The high pressure switch is a critical refrigerant-circuit safety device: it continuously monitors system discharge pressure and opens the control circuit if pressure exceeds a safe threshold — protecting the compressor from catastrophic damage. When this switch fails or wears out, you may experience nuisance high-pressure lockouts, the system failing to start or short-cycling, or a compressor that shuts down shortly after energizing even when pressures appear normal.

• Specs: Cut-out pressure: 670 PSIG | Cut-in pressure: 470 PSIG | OEM Carrier part number: 312926-252 | Factory Authorized Part — meets all original design tolerances
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, engineered to exact cut-out and cut-in pressure specifications. Generic switches often deviate from rated setpoints, risking premature trips or, worse, allowing over-pressure conditions that damage the compressor.
• Install difficulty: 3/5 — Refrigerant circuit work must be performed by an EPA 608-certified technician. Tools required: manifold gauge set, refrigerant recovery equipment, adjustable wrench, and a multimeter to verify continuity before and after replacement. Always recover refrigerant before disconnecting the switch.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered by cutoff time.

Compatibility: Engineered for the Carrier PH3ANA030000BBAA packaged heat pump. Always verify the part number against your unit's data plate and wiring diagram before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment — contact us before you order. In stock and ready to ship today.