OEM Carrier High & Low Pressure Switch Kit HK02ZA395 / HK02ZB044 for Model PH1ZPA060000AAAA

This OEM pressure switch kit includes both the high pressure switch (HK02ZA395) and the low pressure switch (HK02ZB044) — the factory-specified refrigerant safety switches for the Carrier PH1ZPA060000AAAA heat pump system. These switches continuously monitor refrigerant pressure on both the high and low sides of the refrigerant circuit. If pressure falls outside safe operating limits, they open the control circuit and shut the system down to prevent compressor damage. Common failure symptoms include nuisance lockouts, the system not cooling or heating, or the unit short-cycling shortly after startup. In many cases, both switches should be replaced together since refrigerant stress events affect both simultaneously.

• Specs — HK02ZA395 (High Pressure Switch): Open at 395 PSI | Close at 295 PSI | 1/8" NPT thread | 240 VAC | Sensata PS80-03-0018 platform | Replaces 312926-217, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401
• Specs — HK02ZB044 (Low Pressure Switch): Open at 7 PSI | Close at 22 PSI | 50" lead wires | 24V control circuit | OEM Carrier RCD, manufactured in Mexico
• OEM vs Generic: OEM Carrier pressure switches are factory-calibrated to exact cut-in and cut-out tolerances. Generic aftermarket switches frequently carry wider setpoint tolerances, risking either nuisance trips or — more dangerously — delayed shutoff that can destroy a compressor. Always use OEM on refrigerant-side safety switches.
• Install difficulty: 3/5 — Recover refrigerant before disconnecting any refrigerant-side fittings (EPA Section 608 required). Tools needed: manifold gauge set, refrigerant recovery machine, adjustable wrench, 1/4" nut driver, multimeter. Photograph and label all wiring before disconnecting. Verify system pressures after reinstall before restarting.
• Warranty: 1-year OEM factory warranty on both switches. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for Carrier PH1ZPA060000AAAA heat pump systems. Verify refrigerant type and existing switch PSI ratings on the unit data plate or service manual before ordering. Our parts specialists are available to confirm fitment — contact us before you order if you have any questions.