OEM Carrier High Pressure Switch 670-470# for Model PH4ANG024000BAAA

This is the genuine OEM high pressure switch (part# 312926-252) factory-specified for the Carrier PH4ANG024000BAAA packaged heat pump unit. The high pressure switch monitors refrigerant discharge pressure and cuts power to the compressor circuit if pressure exceeds safe operating limits — protecting the compressor from catastrophic failure. When this switch fails or trips and won't reset, you'll typically see symptoms such as nuisance high-pressure lockouts, no-cooling with a fault code, or a system that short-cycles and shuts down shortly after startup. Replacing this switch with the correct OEM part ensures factory-calibrated trip and reset thresholds are maintained.

• Specs: 670 PSI cut-out / 470 PSI cut-in | Refrigerant high-side pressure switch | Factory OEM part# 312926-252 | Meets EN12263 and EN60730-2-6 standards
• OEM vs Generic: OEM switches are calibrated to Carrier's exact 670/470 PSI thresholds. Aftermarket alternatives often carry wider tolerances, risking either premature nuisance trips or delayed shutdown — both damaging to compressor longevity.
• Install difficulty: 3/5 — Refrigerant system must be recovered before replacing this switch on a sealed circuit. Tools needed: manifold gauge set, recovery machine, refrigerant scale, adjustable wrench, and leak detector. Licensed EPA 608-certified technician required.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Verified fit for Carrier model PH4ANG024000BAAA packaged heat pump. Always confirm part number 312926-252 against your unit's data plate or wiring diagram before ordering. Our fitment team is available to verify compatibility before you purchase — no guesswork required.