OEM Carrier Single Run Capacitor P291-1003 for Model PF1MNB036008AAAA

This is the OEM factory-specified single run capacitor (part number P291-1003) for the Carrier PF1MNB036008AAAA fan coil unit. The run capacitor maintains a continuous phase-shifted current to keep the motor running efficiently after startup. A failing or failed capacitor is one of the most common causes of HVAC motor problems — symptoms include a humming compressor or motor that won't spin, hard starts, frequent short-cycling, or a unit that trips on thermal overload and shuts down. Replacing with a factory-matched OEM part ensures your system runs within manufacturer specifications and protects connected motor windings from voltage stress.

• Specs: Single run capacitor | Factory-matched MFD rating | Compatible voltage rating per OEM spec | Replaces OEM part number P291-1003 exactly
• OEM vs Generic: This is a genuine Carrier OEM capacitor with a tightly controlled ±3% MFD tolerance. Aftermarket generic capacitors commonly carry ±10% tolerances, which can accelerate motor wear, reduce efficiency, and void equipment warranties over time.
• Install Difficulty: 2/5 — A single run capacitor is a straightforward swap, but safety is critical. Always disconnect power at the breaker and discharge the capacitor before handling terminals. Tools needed: multimeter, flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers. Photograph all wiring connections before removal.
• Warranty: 1-year OEM factory warranty. Orders placed before our daily cutoff ship the same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for the Carrier PF1MNB036008AAAA fan coil unit. Always verify the MFD and voltage rating on your existing capacitor's label or unit data plate before completing your order. Not sure it fits? Our HVAC parts specialists are available to confirm fitment before you buy — contact us before ordering.