OEM Carrier Low Pressure Switch 312926-258 for Model PH14EB03600GABAB

This OEM low pressure switch (part# 312926-258) is the factory-specified replacement for the Carrier PH14EB03600GABAB heat pump system. The low pressure switch monitors refrigerant pressure on the low side of the refrigerant circuit and sends a signal to the control board to prevent operation under unsafe pressure conditions. When this switch fails or sticks open, the system will typically lock out, refuse to start a heating or cooling cycle, or trip into fault mode — often displaying a low-pressure fault code on the control board.

• Specs: Low pressure switch | Factory-calibrated set point | Direct OEM replacement | Part# 312926-258 | Designed for R-410A refrigerant circuit
• OEM vs Generic: This is a genuine OEM Carrier part, manufactured to exact factory pressure set-point tolerances. Aftermarket switches can drift in calibration, causing nuisance lockouts or — worse — allowing operation under damaging low-pressure conditions.
• Install Difficulty: 3/5 — Refrigerant system work should only be performed by an EPA 608-certified technician. Tools needed: manifold gauge set, 1/4" nut driver, needle-nose pliers, multimeter. Always recover refrigerant per EPA regulations before accessing the low-side port.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed to fit the Carrier PH14EB03600GABAB heat pump unit. Always verify the part number on your existing pressure switch and cross-reference your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us anytime.