OEM Carrier High Pressure Switch HK02ZA395 — 395/295 PSI for Model PY1PEB048090AAAA

This OEM high pressure switch is the factory-specified replacement for the Carrier PY1PEB048090AAAA packaged heat pump unit. The high pressure switch is a critical refrigerant-circuit safety device: it monitors refrigerant discharge pressure on the high side of the system and cuts power to the compressor if pressure exceeds safe limits, preventing catastrophic compressor failure. When this switch fails or trips, you'll typically experience nuisance high-pressure lockouts, compressor shutdowns, or a system that fails to cool/heat altogether — even when refrigerant charge and airflow appear normal. A faulty switch that sticks open will also prevent the system from starting at all.

• Specs: Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT thread fitting | Sensata PS80-03-0018 platform | Rated 6(6)A at 240 VAC | PMAX 41 bar
• OEM vs Generic: This genuine Carrier OEM switch is factory-calibrated to exact cutout/cut-in pressures. Aftermarket substitutes often carry ±5–10% pressure tolerances, risking either false trips under normal load or — more dangerously — failure to protect the compressor at true high-pressure events.
• Install difficulty: 3/5 — System must be fully recovered of refrigerant before replacing this switch (it is installed in the high-pressure refrigerant line). Tools required: refrigerant recovery machine, manifold gauge set, 1" open-end wrench, Teflon tape, and leak detection solution. This job requires an EPA 608 certification.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for Carrier model PY1PEB048090AAAA. This part also replaces legacy Carrier part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501. Always verify refrigerant type and system operating pressures on your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order.