OEM Carrier Single Run Capacitor P291-0503 for Model PG9MAB036040AASA

This OEM single run capacitor (part number P291-0503) is the factory-specified replacement for the Carrier PG9MAB036040AASA gas furnace. The run capacitor continuously supports the blower motor during operation by stabilizing voltage and maintaining the phase shift needed to keep the motor spinning efficiently. When this capacitor begins to fail, you'll typically notice symptoms such as a humming motor that won't start, a blower that starts slowly or intermittently, or a furnace that short-cycles due to overheating caused by reduced airflow.

• Specs: Single run capacitor | Factory OEM-matched MFD and voltage rating | Designed to meet exact Carrier factory tolerance specifications for the PG9MAB036040AASA platform
• OEM vs Generic: This is a genuine OEM Carrier part manufactured to exacting factory standards. Generic capacitors often deviate ±10% from rated MFD, which accelerates motor winding wear, reduces efficiency, and can shorten the operational lifespan of your blower motor.
• Install Difficulty: 2/5 — Capacitors store a dangerous electrical charge even after power is disconnected. Always discharge the capacitor safely before handling. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, a capacitor discharge tool or insulated resistor, and a multimeter to verify the replacement unit before reinstalling the panel.
• Warranty: Backed by a 1-year OEM factory warranty. Orders placed by 3 PM local time ship same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for the Carrier PG9MAB036040AASA gas furnace. Always confirm the MFD and voltage rating printed on your existing capacitor match the replacement before installation. Our HVAC parts specialists are available to verify fitment for your exact unit — contact us before ordering if you have any questions.