OEM Carrier High Pressure Switch 670-470# for Model PH4ANG036000BDAA

This is the factory OEM high pressure switch (part number 312926-252) for the Carrier PH4ANG036000BDAA packaged heat pump unit. The high pressure switch continuously monitors refrigerant discharge pressure on the high side of the refrigeration circuit. When system pressure exceeds the cut-out threshold — caused by a dirty condenser coil, failed condenser fan motor, refrigerant overcharge, or restricted airflow — the switch opens the control circuit and locks out the unit to prevent compressor damage. Symptoms of a failed or nuisance-tripping high pressure switch include: the unit shutting down shortly after start-up, a system lockout fault code on the thermostat or control board, or the compressor cycling off repeatedly on a hot day even with a clean coil.

• Specs: 670 PSI cut-out | 470 PSI cut-in | OEM part number 312926-252 | Factory-rated for R-410A refrigerant systems | Certifications: EN12263, EN60730-2-6
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part — engineered to exact pressure thresholds for the PH4ANG036000BDAA compressor circuit. Aftermarket pressure switches often carry ±5–10% pressure tolerance variation, which can allow damaging over-pressure events before the switch opens.
• Install difficulty: 3/5 — High pressure switch replacement requires recovering refrigerant if the switch is installed in a pressurized line. A licensed EPA 608-certified technician is required. Tools needed: manifold gauge set, refrigerant recovery unit, torque wrench, and multimeter to confirm switch continuity before re-commissioning.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH4ANG036000BDAA packaged heat pump unit (3-ton, R-410A). Always verify your unit's data plate and existing switch pressure ratings before ordering. Our team is available to confirm fitment — contact us before you order if you have any questions.