OEM Carrier High Pressure Switch 670/470 PSI for Model PH3ANA030000BAAA

This is the genuine OEM high pressure switch (part number 312926-252), factory-specified for the Carrier PH3ANA030000BAAA packaged heat pump unit. The high pressure switch continuously monitors refrigerant-side discharge pressure and opens the control circuit when system pressure exceeds safe operating limits — protecting the compressor from catastrophic failure. When this switch fails or trips on a fault condition, you'll typically see a system lockout, nuisance high-pressure fault codes, or a unit that shuts down shortly after startup with no obvious refrigerant or airflow restriction.

• Specs: Cut-Out: 670 PSI | Cut-In: 470 PSI | OEM Part Number: 312926-252 | Genuine Carrier Factory Authorized Part
• OEM vs Generic: This is a genuine Carrier OEM switch manufactured to exact factory pressure thresholds. Aftermarket switches frequently carry ±10–15% tolerance variances that can allow unsafe pressure operation or cause false trips, shortening compressor life.
• Install Difficulty: 3/5 — Refrigerant-side component. EPA Section 608 certification required to work on refrigerant circuits. Tools needed: manifold gauge set, refrigerant recovery equipment, service wrench. Always recover refrigerant before replacing. Verify pressures after reinstallation.
• Warranty: Covered by Carrier's manufacturer warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Fits Carrier model PH3ANA030000BAAA packaged heat pump. Verify part number 312926-252 against your unit's wiring diagram and data plate before ordering. Our technical team is available to confirm fitment — contact us before you order if you have any questions.