OEM Carrier High Pressure Switch HK02ZA395 for Model PH1PNB036000ABAA

This genuine OEM Carrier high pressure safety switch (part number HK02ZA395) is the factory-specified replacement for the Carrier PH1PNB036000ABAA heat pump system. The high pressure switch monitors refrigerant pressure on the discharge side of the compressor and opens the safety circuit when pressure exceeds safe operating limits — protecting the compressor from catastrophic over-pressure failure. When this switch fails or trips, symptoms include nuisance high-pressure lockouts, no-cooling or no-heating operation, and fault codes on the control board. A secondary low pressure switch, HK02ZB044 (opens at 7 PSI / closes at 22 PSI), is also associated with this model and sold separately — consider inspecting both switches during diagnosis.

• Specs: Opens at 395 PSI | Closes at 295 PSI | 1/8" NPT thread | 240 VAC rated | Sensata PS80-03-0018 platform | OEM part number HK02ZA395
• OEM vs Generic: This is a genuine Carrier OEM switch — factory-matched pressure thresholds ensure the compressor is protected at the exact design set points. Aftermarket switches with loose tolerances can allow over-pressure conditions that void compressor warranties.
• Install Difficulty: 2/5 — Recover all refrigerant before disconnecting the switch (EPA Section 608 required). Tools needed: manifold gauge set, refrigerant recovery machine, 1-1/16" open-end wrench, thread sealant (PTFE tape rated for refrigerant). Always verify system pressure is zero before removal.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM ET.

Compatibility: Designed as a direct OEM replacement for Carrier model PH1PNB036000ABAA. Also replaces legacy part numbers: 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, and HK02ZA501. Verify the open/close PSI ratings on your unit's data plate before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today.