OEM Carrier High & Low Pressure Switch Kit HK02ZA395 / HK02ZB044 for Model PH1PEA048000ACBA

This OEM-matched pressure switch kit includes both the high pressure switch (HK02ZA395) and the low pressure switch (HK02ZB044) — the factory-specified refrigerant-side safety switches for the Carrier PH1PEA048000ACBA heat pump package unit. These switches continuously monitor refrigerant circuit pressure and command the system to shut down if pressures fall outside safe operating limits. When either switch fails, you'll typically see hard lockout faults, nuisance tripping, or a system that starts briefly and immediately shuts off — often misdiagnosed as a compressor or control board failure.

• Specs — High Pressure Switch (HK02ZA395): Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT thread | 240 VAC | Sensata PS80-03-0018 platform | Replaces 312926-217, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401 and others
• Specs — Low Pressure Switch (HK02ZB044): Opens at 7 PSI | Closes at 22 PSI | 24V | 50" lead wires | Cut-In Temp 7 / Cut-Out Temp 22 | OEM Carrier RCD | Country of origin: Mexico
• OEM vs Generic: OEM Carrier pressure switches are factory-calibrated to exact cut-in/cut-out tolerances. Aftermarket units frequently drift outside spec within one season, causing nuisance lockouts or — worse — failing to protect the compressor from a damaging refrigerant overcharge or undercharge event.
• Install difficulty: 2/5 — Recover refrigerant before replacing any refrigerant-side pressure switch. Tools needed: manifold gauge set, refrigerant recovery machine, adjustable wrench, wire terminals. Always verify the fault code and test switch continuity with a multimeter before condemning. Recheck superheat and subcooling after recharge.
• Warranty: 1-year OEM factory warranty on both switches. Ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PH1PEA048000ACBA packaged heat pump unit. Confirm refrigerant type and model data plate before ordering. Need help verifying fitment? Our HVAC parts specialists confirm compatibility before you buy — and we ship the same day your order is placed.