OEM Carrier High & Low Refrigerant Pressure Switch Kit for Model PH15NB04800GBBAA

This OEM-matched pressure switch kit includes both the high pressure switch (312926-252) and low pressure switch (312926-258) factory-specified for the Carrier PH15NB04800GBBAA heat pump. These refrigerant-side safety switches continuously monitor system pressures to protect the compressor from damage caused by abnormally high discharge pressure or dangerously low suction pressure. When either switch trips or fails, the system will lock out, short-cycle, or display a fault code — symptoms often misdiagnosed as a refrigerant leak or control board failure.

• Specs: 312926-252 High Pressure Switch | 312926-258 Low Pressure Switch | Factory-calibrated trip points | Schrader-port or inline refrigerant circuit mount | Compatible with R-410A refrigerant systems
• OEM vs Generic: OEM Carrier pressure switches are calibrated to exact factory trip and reset pressures. Aftermarket substitutes frequently use wider tolerances, risking nuisance trips or — more dangerously — delayed shutoff that can destroy a compressor.
• Install difficulty: 3/5 — Refrigerant recovery is required before replacing inline pressure switches. Tools needed: manifold gauge set, recovery machine, refrigerant scale, adjustable wrench, and leak detector. EPA 608 certification required to handle refrigerant. Recommend professional installation.
• 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 engineered specifically for the Carrier PH15NB04800GBBAA 4-ton heat pump. Always verify OEM part numbers 312926-252 and 312926-258 against your unit's wiring diagram or data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — contact us before placing your order.