OEM Carrier Single Run Capacitor P291-1003 for Model PF1MNB036000AAAA

This OEM single run capacitor (part number P291-1003) is the factory-specified replacement for the Carrier PF1MNB036000AAAA fan coil and air handler system. The run capacitor maintains a continuous phase-shifted current to keep the fan motor running at peak efficiency after startup. When it degrades or fails, you'll notice symptoms such as a buzzing or humming motor that won't spin, intermittent shutdowns, or a condenser/blower fan that draws excessive amperage and overheats — often leading to nuisance tripping of the motor's thermal overload protector.

• Specs: Single run capacitor | Factory-matched MFD rating | 370V/440V rated | Cylindrical case | OEM-spec ±5% tolerance for motor longevity
• OEM vs Generic: This is a genuine OEM Carrier part — not an aftermarket substitute. OEM capacitors are wound to exact factory MFD tolerances, protecting your motor windings from the voltage stress that loosely-spec'd generic units can cause over time.
• Install difficulty: 2/5 — Always discharge the capacitor terminals before handling (use an insulated resistor or discharge tool). Tools needed: 1/4" nut driver, needle-nose pliers, multimeter with capacitance setting. Photograph all wiring connections before disconnecting the old unit.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before our daily cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier PF1MNB036000AAAA air handler/fan coil unit. Always verify the MFD rating and voltage on your existing capacitor's label or your unit's data plate before ordering to confirm an exact match. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you buy — contact us anytime.