OEM Carrier High & Low Pressure Switch Kit for Model PH10JA048000ABAA — HK02ZA395 & HK02ZB038

This OEM pressure switch kit includes both the high pressure switch (HK02ZA395) and the low pressure switch (HK02ZB038), the factory-specified refrigerant safety switches for the Carrier PH10JA048000ABAA heat pump system. These switches continuously monitor refrigerant circuit pressure and protect the compressor from catastrophic damage caused by abnormal high- or low-side pressure conditions. When either switch fails or trips and won't reset, the system will lock out on a fault code, resulting in a complete loss of cooling or heating — even if the compressor and refrigerant charge are otherwise fine.

• Specs — HK02ZA395 (High Pressure Switch): Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT thread | 240 VAC | Sensata PS80-03-0018 platform | SPST normally closed
• Specs — HK02ZB038 (Low Pressure Switch): Opens at 7 PSI | Closes at 22 PSI | 50" lead wires | Sensata PS80 platform | Designed for R-410A refrigerant circuits
• OEM vs Generic: OEM Carrier pressure switches are calibrated to exact trip-point tolerances for the PH10JA048000ABAA refrigerant circuit. Generic aftermarket switches frequently carry wider pressure tolerances, risking nuisance trips or — worse — delayed cutout that damages the compressor.
• Install difficulty: 3/5 — Refrigerant circuit work requires an EPA 608 certified technician. Tools needed: manifold gauge set, 1/4" flare wrenches, multimeter for continuity verification. Always recover refrigerant before disconnecting the high-side switch. Low-side switch (HK02ZB038) is accessible via spade connectors; photograph wiring before disconnecting.
• Warranty: 1-year OEM factory warranty on both switches. Orders placed by 3 PM local time ship same business day from our warehouse.

Compatibility: This kit is engineered specifically for the Carrier PH10JA048000ABAA heat pump. HK02ZA395 also replaces legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, and HK02ZA435. Verify refrigerant type and system model on your data plate before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required.