OEM Carrier High & Low Pressure Switch Kit (312926-252 / 312926-258) for Model PH13PB06000GAAAA

This OEM-matched pressure switch kit includes both the high pressure switch (312926-252, 670/470 PSI) and the low pressure switch (312926-258, 55/23 PSI) factory-specified for the Carrier PH13PB06000GAAAA packaged heat pump unit. Pressure switches are refrigerant-circuit safety controls: the high pressure switch trips when system pressure exceeds safe operating limits to protect the compressor from over-pressurization, while the low pressure switch opens on a loss-of-charge condition to prevent compressor damage from inadequate lubrication. A failed pressure switch typically causes nuisance lockouts, a system that starts then immediately shuts down, or a unit that refuses to enter the heating or cooling cycle at all.

• Part Numbers & Specs: High Pressure Switch — OEM Part# 312926-252 | Set Point: 670 PSI cut-out / 470 PSI cut-in | Low Pressure Switch — OEM Part# 312926-258 | Set Point: 55 PSI cut-out / 23 PSI cut-in | Factory Authorized Parts (Carrier RCD)
• OEM vs Generic: Genuine Carrier OEM pressure switches are factory-calibrated to exact set-point tolerances. Aftermarket substitutes often carry wider PSI tolerances, risking false trips or — more dangerously — failure to trip under a true fault condition, leaving your compressor unprotected.
• Install Difficulty: 3/5 — Refrigerant circuit work must be performed by an EPA Section 608 certified technician. The system must be recovered before replacing refrigerant-side pressure switches. Tools required: manifold gauge set, recovery machine, refrigerant scale, multimeter, and 1/4" flare fitting tools. Always verify system pressure after recharge before returning the unit to service.
• Warranty: 1-year OEM manufacturer warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: This kit is designed for the Carrier PH13PB06000GAAAA packaged heat pump. Verify both part numbers against your unit's wiring diagram and data plate before ordering — high and low switches are not interchangeable. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you order. In stock — ships today.