OEM Carrier High Pressure Switch 670/470 PSI for Model PH4ANG060000BBAA

This is the genuine OEM Carrier high pressure switch (part number 312926-252), factory-specified for the Carrier PH4ANG060000BBAA packaged heat pump unit. The high pressure switch is a critical refrigerant-circuit safety device: it continuously monitors refrigerant discharge pressure and cuts power to the compressor if pressure exceeds the safe operating threshold, protecting the compressor from catastrophic damage due to overcharge, restricted airflow, or a failing condenser fan motor. When this switch fails or trips without resetting, you'll typically experience compressor lockout, nuisance fault codes, or an outdoor unit that shuts down shortly after startup.

• Specs: Trip (open) pressure: 670 PSI | Reset (close) pressure: 470 PSI | OEM Part Number: 312926-252 | Genuine Carrier factory part
• OEM vs Generic: OEM switches are calibrated to exact factory PSI thresholds. Aftermarket alternatives may trip outside specification, leading to either inadequate compressor protection or chronic nuisance lockouts that mask other system issues.
• Install difficulty: 3/5 — Refrigerant circuit access is required. This repair must be performed by an EPA 608-certified technician. Tools needed: manifold gauge set, refrigerant recovery equipment, wire terminals, and a torque wrench. Always recover refrigerant before removing the switch.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered as a direct OEM replacement for the Carrier PH4ANG060000BBAA 5-ton packaged heat pump. Verify the part number on your existing switch label before ordering. Our technical team is available to confirm fitment — reach out before you buy if you have any questions. In stock and ready to ship today.