OEM Carrier High & Low Pressure Switch Kit for Model PH1PPA060000AABA — HK02ZA395 & HK02ZB044

This OEM pressure switch kit includes both the high pressure switch (HK02ZA395) and the low pressure switch (HK02ZB044) — the factory-specified safety controls for the Carrier PH1PPA060000AABA packaged heat pump unit. Together, these switches monitor refrigerant-side pressure and cut power to the compressor if pressure falls outside safe operating limits. A failed high pressure switch typically causes nuisance lockouts or tripped fault codes; a failed low pressure switch causes the system to short-cycle or shut down on a no-cool call. Replacing both at once eliminates future callbacks and restores full refrigerant-circuit protection.

• Specs — HK02ZA395 (High Pressure Switch): Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT thread | 240 VAC rated | Sensata PS80-03-0018 platform | Factory-certified for Carrier PH1PPA060000AABA
• Specs — HK02ZB044 (Low Pressure Switch): Opens at 7 PSI | Closes at 22 PSI | 50" lead wire | 24V control circuit | OEM Carrier/Bryant/Payne fitment
• OEM vs Generic: OEM switches are calibrated to exact factory cut-in/cut-out tolerances. Aftermarket alternatives often drift ±5–10% on setpoints, risking compressor overload or premature lockout. These are genuine Carrier-branded parts — not substitutes.
• Install difficulty: 3/5 — Recover refrigerant before accessing high-side components (EPA 608 certification required). Tools: manifold gauge set, 1/4" and 3/8" flare wrenches, refrigerant recovery unit, multimeter. Always verify zero pressure before removing switches. Low pressure switch (HK02ZB044) is accessible without full recovery on suction side with proper valve isolation.
• Warranty: 1-year OEM factory warranty on both switches. Ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PH1PPA060000AABA packaged heat pump. The HK02ZA395 also cross-references to legacy part numbers including 312926-217, 71267D1, HK02ZA380, HK02ZA396, and HK02ZA400. Verify refrigerant circuit type and existing switch PSI ratings against your unit's data plate before ordering. Our fitment team is available to confirm compatibility — just reach out before you buy.