OEM Carrier Low Pressure Switch 55-23# (312926-258) for Model PH14EB06000GBAAB

This is the genuine OEM Carrier low pressure switch (part number 312926-258), factory-specified for the Carrier PH14EB06000GBAAB heat pump. The low pressure switch continuously monitors refrigerant suction-side pressure and opens the control circuit if pressure drops below a safe threshold — protecting the compressor from catastrophic damage due to low refrigerant charge, a blocked filter, or a failing metering device. Common failure symptoms include the system locking out on a low-pressure fault code, the compressor short-cycling, or the unit running continuously with no cooling.

• Specs: 55-23# rated | Factory set open at 0.5" W.C. / close at 0.75" W.C. | Brass inlet connector | Precision-calibrated diaphragm | Pre-wired color-coded leads | Cross-references: Sensata PS80-02-F1270, PSL 312926-258, 300R18
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part — not an aftermarket substitute. OEM pressure switches are calibrated to exact set-point tolerances. Off-brand switches frequently drift out of spec, causing nuisance trips or, worse, failing to protect the compressor when refrigerant charge is genuinely low.
• Install difficulty: 3/5 — Refrigerant circuit work requires an EPA 608 certified technician. Tools needed: manifold gauge set, 1/4" flare fittings, multimeter, wire crimps. Always recover refrigerant before disconnecting the switch. Verify system pressure after replacement.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered for the Carrier PH14EB06000GBAAB heat pump. Always verify your unit's data plate and existing switch markings before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork, no returns.