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This is the genuine OEM Carrier single run capacitor (part number P291-0503) factory-specified for the Carrier PG9MAB036040ABSA gas furnace. The run capacitor provides the sustained electrical charge needed to keep the indoor blower motor spinning at rated torque and efficiency. When this capacitor weakens or fails, you'll typically notice the blower motor humming without starting, running sluggishly, drawing excess current, or shutting off intermittently — all of which can lead to overheating and premature motor failure if left unaddressed.
Compatibility: Designed as the direct factory replacement for Carrier model PG9MAB036040ABSA gas furnaces. Note: P291-0503 has been superseded by P291-0504 — both are fully interchangeable at the same 5 MFD / 370V specification. Always verify the MFD and voltage rating on your unit's data plate before ordering. Our team is available to confirm fitment prior to purchase.