OEM Carrier High Pressure Switch 670/470 PSI for Model PH4ANG048000BCAA

This is the factory OEM high pressure switch (part number 312926-252) for the Carrier PH4ANG048000BCAA packaged heat pump unit. The high pressure switch is a critical refrigerant-side safety control: it continuously monitors system discharge pressure and opens the circuit to shut down the compressor the moment pressure exceeds the safe threshold. Without a properly functioning switch, excessive refrigerant pressure can cause catastrophic compressor failure, refrigerant leaks, and costly system damage. Common failure symptoms include nuisance lockouts, the system shutting off shortly after startup, or fault codes indicating a high pressure trip on your thermostat or control board.

• Specs: Cut-out pressure: 670 PSI | Cut-in pressure: 470 PSI | OEM Part Number: 312926-252 | Genuine Carrier Factory Authorized Part
• OEM vs Generic: This is a genuine OEM Carrier part engineered to exact factory pressure tolerances. Aftermarket substitutes often carry wider PSI tolerances that can allow unsafe pressure excursions or cause nuisance trips — risking your compressor and voiding equipment warranties.
• Install difficulty: 3/5 — Refrigerant-side work must be performed by an EPA 608-certified technician. The system must be recovered before accessing the high-side port. Tools required: manifold gauge set, recovery machine, torque wrench, and multimeter to verify switch continuity after install.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH4ANG048000BCAA packaged heat pump. Verify OEM part number 312926-252 against your unit's data plate and wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you buy for peace of mind. Order today and receive same-day shipping on in-stock parts.