OEM Carrier High & Low Pressure Switch Kit (312926-252 & 312926-258) for Model PH13NA06000GABAA

These are the factory OEM replacement pressure switches for the Carrier PH13NA06000GABAA heat pump. The high pressure switch (312926-252, 670/470 PSI) monitors refrigerant discharge pressure and trips the system offline if pressure climbs dangerously high — protecting the compressor from catastrophic failure. The low pressure switch (312926-258, 55/23 PSI) guards against low-side pressure drop caused by refrigerant loss or a blocked metering device, shutting the system down before the compressor is damaged by low lubrication. Together, they are the primary safety circuit for refrigerant pressure in this unit. If your system is locking out, short-cycling, or throwing a pressure fault code, one or both of these switches is a leading suspect.

• Part Numbers: 312926-252 (High Pressure Switch, 670 cut-out / 470 cut-in PSI) | 312926-258 (Low Pressure Switch, 55 cut-out / 23 cut-in PSI) | Factory Authorized Parts — genuine Carrier OEM
• OEM vs Generic: OEM pressure switches are calibrated to exact factory PSI setpoints. Aftermarket substitutes frequently use wider tolerances, meaning the switch may trip late (allowing excess pressure) or nuisance-trip early — both conditions shorten compressor life significantly.
• Install Difficulty: 3/5 — Refrigerant system must be recovered before replacing pressure switches on most configurations. Tools needed: manifold gauge set, refrigerant recovery unit, adjustable wrench, multimeter (to confirm open/closed continuity before reinstallation). Licensed EPA 608 technician required for refrigerant handling.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse. Free shipping on qualifying orders.

Compatibility: Engineered specifically for the Carrier PH13NA06000GABAA packaged heat pump. Always verify your unit's data plate and existing PSI ratings before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — call or chat now.