OEM Carrier High & Low Pressure Switch Kit for Model PH13NB04800GABAA

This factory-matched OEM pressure switch set includes both the High Pressure Switch (312926-252) and Low Pressure Switch (312926-258), engineered specifically for the Carrier PH13NB04800GABAA packaged heat pump unit. Pressure switches are critical safety devices that monitor refrigerant-side pressure in both the high and low circuits. When either switch detects an out-of-range pressure condition — caused by refrigerant loss, blocked airflow, a failed metering device, or a locked-out compressor — it opens the control circuit and triggers a system lockout to prevent compressor damage. Common symptoms of failure include the unit short-cycling, displaying a fault code, or refusing to enter heating or cooling mode entirely.

• Included Parts: (1) 312926-252 High Pressure Switch | (1) 312926-258 Low Pressure Switch | Factory-calibrated trip points matched to R-410A refrigerant operating pressures for the PH13NB04800GABAA platform
• OEM vs Generic: OEM Carrier pressure switches are calibrated to exact cut-in and cut-out pressure thresholds. Off-brand substitutes often carry wider tolerances, risking nuisance trips or — more dangerously — delayed lockout that can damage the compressor.
• Install Difficulty: 3/5 — Refrigerant system must be properly recovered before accessing high-side components. Tools required: manifold gauge set, refrigerant recovery unit, adjustable wrench, thread sealant tape, and a multimeter to confirm continuity after installation. Recommended for certified HVAC technicians.
• Warranty: 1-year OEM factory warranty on both switches. Orders ship same business day from our warehouse when placed before 3 PM local time.

Compatibility: This kit is designed for the Carrier PH13NB04800GABAA 4-ton packaged heat pump. Always verify OEM part numbers 312926-252 and 312926-258 against your unit's wiring diagram or data plate before ordering. Need fitment confirmed? Our HVAC parts specialists are available to verify compatibility before you purchase — no guesswork required. Order now and ship today.