OEM Carrier High & Low Pressure Switch Kit HK02ZA395 / HK02ZB044 for Model PH1ZPA048000ABAA

This factory-matched OEM pressure switch set is the direct replacement for the Carrier PH1ZPA048000ABAA heat pump system. The kit includes two critical safety switches that work in tandem to protect the refrigerant circuit: the HK02ZA395 high pressure switch (opens at 395 PSI / closes at 295 PSI) and the HK02ZB044 low pressure switch (opens at 7 PSI / closes at 22 PSI, 50" leads, 24V). When either switch fails, the system will typically lock out, short-cycle, or fail to cool entirely — symptoms often misdiagnosed as compressor or refrigerant issues.

• Specs — HK02ZA395 High Pressure Switch: Opens 395 PSI | Closes 295 PSI | 1/8" NPT thread | 240 VAC | Sensata PS80 platform | Replaces 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, and more
• Specs — HK02ZB044 Low Pressure Switch: Opens 7 PSI | Closes 22 PSI | 50" leads | 24V | OEM Carrier RCD | Country of Origin: Mexico
• OEM vs Generic: OEM switches are calibrated to exact factory cut-in/cut-out setpoints. Aftermarket substitutes frequently drift outside tolerance, triggering nuisance lockouts or — worse — failing to protect the compressor from dangerous pressure extremes.
• Install difficulty: 3/5 — Refrigerant system must be safely recovered before replacing the high pressure switch. Low pressure switch replacement is less invasive but requires careful lead routing. Tools needed: manifold gauge set, 1" open-end wrench, Schrader valve core tool, thread sealant tape. Always verify system pressures with gauges after replacement.
• Warranty: 1-year OEM factory warranty on both switches. Orders ship same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PH1ZPA048000ABAA packaged heat pump unit. Verify refrigerant type and system operating pressures against your unit's data plate before ordering. Our technical team is available to confirm fitment — contact us before you buy if you have any questions.