OEM Carrier High Pressure Switch 670/470 PSI for Model PH3ANA030000BCAA

This is the genuine OEM Carrier high pressure switch (part number 312926-252), the factory-specified replacement for Carrier model PH3ANA030000BCAA packaged heat pump systems. The high pressure switch is a critical refrigerant-circuit safety control: it continuously monitors system high-side pressure and cuts out the compressor if pressure exceeds the safe operating threshold, protecting the compressor and refrigerant circuit from catastrophic over-pressurization damage. A failed or out-of-spec pressure switch commonly causes nuisance lockouts, a compressor that shuts off prematurely, or a system that will not run at all. Always confirm a faulty switch with manifold gauge readings before replacing.

• Specs: Cut-out pressure 670 PSI | Reset pressure 470 PSI | Genuine Carrier OEM part | Meets EN12263 and EN60730-2-6 safety standards
• OEM vs Generic: OEM switches are calibrated to exact factory cut-out and reset pressures. Aftermarket switches frequently carry wider pressure tolerances, risking either false trips or — more dangerously — failure to protect the compressor at true over-pressure conditions.
• Install difficulty: 3/5 — Refrigerant circuit work requires EPA 608 certification. The system must be recovered or isolated before replacing the switch. Tools needed: manifold gauge set, adjustable wrenches, leak detection solution. Always verify pressure thresholds after installation with a gauge set before returning the unit to service.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Designed for Carrier model PH3ANA030000BCAA packaged heat pump equipment. Verify OEM part number 312926-252 against your unit's data plate or wiring diagram before ordering. Not sure it fits? Our parts specialists verify fitment before you buy — contact us anytime.