OEM Carrier High Pressure Switch 670-470 PSI for Model PH4ANG030000BDAA

This is the genuine OEM Carrier high pressure switch (part number 312926-252), factory-specified for the Carrier PH4ANG030000BDAA packaged heat pump system. The high pressure switch is a critical refrigerant-circuit safety control: it continuously monitors refrigerant pressure on the high side and opens the circuit to shut down the compressor when pressure exceeds a safe threshold — protecting your system from catastrophic compressor failure. Common symptoms of a failed high pressure switch include nuisance lockouts, the compressor refusing to start, or the system tripping on a high-pressure fault code with no apparent refrigerant issue.

• Specs: Cut-out at 670 PSI | Reset at 470 PSI | Factory-matched OEM tolerances | Certified to EN12263 and EN60730-2-6 standards
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, manufactured to exact pressure cut-out and reset specifications. Generic alternatives may carry wider pressure tolerances, risking nuisance trips or — worse — insufficient protection against true over-pressurization events.
• Install difficulty: 3/5 — Refrigerant recovery and recharge are required before replacing this switch on a sealed system. Tools needed: manifold gauge set, recovery machine, torque wrench, leak detector. This repair must be performed by an EPA 608-certified technician.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for the Carrier PH4ANG030000BDAA packaged heat pump. Always verify the part number against your unit's data plate and wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.