OEM Carrier High Pressure Switch 670/470 PSI for Model PH3ANA036000BAAA

This OEM high pressure switch (part number 312926-252) is the factory-specified safety control replacement for the Carrier PH3ANA036000BAAA packaged heat pump unit. The high pressure switch continuously monitors refrigerant circuit pressure and cuts power to the compressor the moment pressure exceeds the safe upper threshold. When this switch fails or trips, your system may lock out entirely, short-cycle, or refuse to cool or heat — symptoms that are often misdiagnosed as compressor or refrigerant issues. Always confirm the switch is the root cause before replacing refrigerant or larger components.

• Specs: Cut-out pressure: 670 PSIG | Cut-in (reset) pressure: 470 PSIG | Factory-calibrated safety control | OEM part number: 312926-252
• OEM vs Generic: This is a genuine Carrier OEM part built to exact factory pressure tolerances. Aftermarket switches frequently ship with calibration drift that can allow dangerously high head pressure or cause nuisance trips, accelerating compressor wear and voiding equipment warranties.
• Install difficulty: 3/5 — Refrigerant circuit work requires an EPA 608 certified technician. The system must be recovered and the circuit depressurized before removal. Tools needed: manifold gauge set, recovery machine, torque wrench, and leak detector. Always verify the new switch reads correct cut-out and cut-in pressure after recharge.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from stock — order by 5 PM local time.

Compatibility: Engineered as a direct OEM replacement for Carrier PH3ANA036000BAAA packaged heat pump systems. Verify refrigerant type and system operating pressure range against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you purchase.