OEM Carrier High & Low Pressure Switch Kit (312926-252 / 312926-258) for Model PH15NA06000GBAAA

This OEM pressure switch set includes the factory-specified High Pressure Switch (312926-252, 670-470#) and Low Pressure Switch (312926-258) for the Carrier PH15NA06000GBAAA heat pump. Pressure switches are refrigerant-circuit safety devices: the high-pressure switch (HPS) opens on dangerous high-side pressure, cutting the compressor to prevent damage, while the low-pressure switch (LPS) opens when suction pressure drops too low — often indicating a refrigerant leak or metering issue. Symptoms of a failed pressure switch include the system locking out on start-up, nuisance trips with no clear refrigerant fault, or the compressor refusing to energize despite the thermostat calling for cooling or heating.

• Specs — High Pressure Switch (312926-252): 670 PSI cut-out / 470 PSI cut-in | SPST-NC | Factory-matched Carrier OEM | Genuine LF18-094 series
• Specs — Low Pressure Switch (312926-258): Factory OEM low-side cut-out | SPST-NC | Engineered to match PH15NA06000GBAAA refrigerant circuit operating pressures
• OEM vs Generic: OEM switches use factory-calibrated set points critical for R-410A operating pressures. Aftermarket substitutes frequently carry wider tolerances, risking either nuisance trips or failure to protect the compressor from genuine high-side events.
• Install Difficulty: 3/5 — Refrigerant circuit access required. Tools needed: manifold gauge set, refrigerant recovery equipment, adjustable wrench, leak detector. Must be performed by an EPA 608-certified technician. Always recover refrigerant before removing switches; new switches require a leak check after installation.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for the Carrier PH15NA06000GBAAA residential heat pump. Verify both high-side and low-side switch part numbers against your unit's wiring diagram or data plate before ordering. Not sure? Contact our fitment team — we verify compatibility before you buy. Order by 3 PM local time and ships the same business day.