OEM Carrier High Pressure Switch HK02ZA395 & Low Pressure Switch HK02ZB044 for Model PH2PEB048000AA

This listing covers both factory OEM refrigerant pressure switches specified for the Carrier PH2PEB048000AA heat pump / packaged unit. The HK02ZA395 high pressure switch opens at 406 PSI and closes at 295 PSI, protecting the compressor from dangerously elevated refrigerant pressure. The HK02ZB044 low pressure switch opens at 7 PSI and closes at 22 PSI, preventing compressor operation during low-charge or loss-of-charge conditions. When either switch fails or trips without reset, you'll typically see a system lockout, a fault code on the control board, or the unit short-cycling immediately after startup.

• HK02ZA395 Specs: High pressure safety switch | Open 406 PSI / Close 295 PSI | 1/8" NPT thread | 240 VAC | Sensata PS80 platform | OEM Carrier part
• HK02ZB044 Specs: Low pressure switch | Open 7 PSI / Close 22 PSI | 50" lead wires | 24V | Cut-in 7 / Cut-out 22 | Made in Mexico | OEM Carrier part
• OEM vs Generic: OEM pressure switches are factory-calibrated to exact trip points. Generic aftermarket switches often carry ±5–10% PSI tolerances, which can allow nuisance trips or, worse, delayed protection — risking costly compressor damage.
• Install Difficulty: 2/5 — Recover refrigerant before replacing the high-pressure switch (EPA 608 required). The low-pressure switch replacement is straightforward with the system in a safe, de-energized state. Tools needed: manifold gauge set, adjustable wrench, multimeter, Teflon tape. Always photograph wiring before disconnecting terminals.
• Warranty: 1-year OEM factory warranty on both switches. In-stock and ships same business day from our warehouse.

Compatibility: Designed as direct OEM replacements for Carrier model PH2PEB048000AA. The HK02ZA395 also replaces legacy part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, and others. Verify your model's data plate and existing switch trip points before ordering. Our team is available to confirm fitment prior to purchase.