OEM Carrier High Pressure Switch 312926-252 for Model PH4ANG060000BAAA

This is the genuine OEM Carrier high pressure switch (part number 312926-252), factory-specified for the Carrier PH4ANG060000BAAA packaged heat pump unit. Rated at 670 PSI cutout / 470 PSI cut-in, this switch continuously monitors refrigerant pressure on the high side of the refrigeration circuit. When system pressure exceeds the safe threshold — due to a dirty condenser coil, failed condenser fan motor, overcharge, or blocked airflow — the switch opens the control circuit to protect the compressor from catastrophic damage. A failed or nuisance-tripping high pressure switch will cause the system to lock out on a fault code, short-cycle, or fail to cool entirely.

• Specs: 670 PSI cutout | 470 PSI cut-in | Factory OEM rating | Part No. 312926-252 | Replaces 312926252
• OEM vs Generic: This is a genuine Carrier factory part, manufactured to exact pressure setpoint tolerances. Generic aftermarket switches can drift in calibration over time, triggering false lockouts or — worse — failing to protect the compressor at true high-pressure events.
• Install difficulty: 3/5 — High-pressure refrigerant circuit work requires an EPA 608 Certification. Tools needed: manifold gauge set, refrigerant recovery equipment, adjustable wrench, and leak detection solution. Always recover refrigerant before replacing the switch. Confirm system pressure is within spec before restarting.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PH4ANG060000BAAA 5-ton packaged heat pump. Verify your unit's data plate and existing switch pressure ratings before ordering. Not sure if this is the right part? Our HVAC parts specialists confirm fitment before you order — reach out before checkout.