OEM Carrier Dual Pressure Switch Kit (HK02ZA395 & HK02ZB044) for Model PH1PNB060000AAAA

This OEM pressure switch kit includes both the high pressure switch (HK02ZA395) and the low pressure switch (HK02ZB044) factory-specified for the Carrier PH1PNB060000AAAA 5-ton heat pump condensing unit. Together, these switches monitor refrigerant-side pressures and protect the compressor by cutting power when operating pressures fall outside safe limits. A failed high-side switch causes nuisance lockouts and no-cooling complaints; a failed low-side switch typically triggers fault codes related to low refrigerant or loss of charge. Replacing both switches simultaneously eliminates repeat service calls and restores full system protection.

• Specs — High Pressure Switch (HK02ZA395): Opens at 395 PSI | Closes at 295 PSI | 240 VAC rated | 1/8" NPT male thread | Sensata PS80-03-0018 platform | Replaces legacy Carrier P/Ns 312926-217, HK02ZA380, HK02ZA396, HK02ZA400, and more
• Specs — Low Pressure Switch (HK02ZB044): Opens at 7 PSI | Closes at 22 PSI | 24V coil circuit | 50" lead length | Drop-in OEM replacement — meets exact factory design specifications for optimum system performance
• OEM vs Generic: OEM Carrier pressure switches are manufactured to exact cut-in and cut-out tolerances, preserving equipment warranty and maintaining agency safety listings. Aftermarket switches often carry wider tolerance bands that can mask developing refrigerant issues or cause nuisance trips.
• Install Difficulty: 3/5 — Requires recovering refrigerant charge before replacing the high-side switch. Low-side switch replacement is simpler but still requires proper EPA 608 certification. Tools needed: manifold gauge set, refrigerant recovery unit, 1/4" nut driver, wire stripper. Always de-energize the unit and photograph wiring before disconnecting.
• Warranty: 1-year OEM factory warranty on both switches. Ships same business day from our warehouse.

Compatibility: Factory-matched for Carrier model PH1PNB060000AAAA 5-ton heat pump condensing unit. Verify part numbers against your unit's wiring diagram and data plate before ordering. Our technical team is available to confirm fitment — contact us before you buy.