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The RECTORSEAL M12164 is a dual-run capacitor rated at 20/15 microfarads (MFD) and 370 volts, designed for use in residential and light commercial HVAC systems. Dual-run capacitors serve two motor loads simultaneously, typically the compressor and the condenser fan motor, from a single oval-bodied unit. This capacitor maintains the phase shift needed to start and run PSC motors efficiently. The oval form factor is the standard configuration for most split-system air conditioners and heat pumps. Installation is performed by licensed HVAC technicians during routine service calls or compressor and fan motor replacement work.
This capacitor is suited for split-system air conditioners, heat pumps, and package units where a single oval dual-run capacitor serves both the compressor and condenser fan motor circuits. Its 370-volt rating covers the operating voltage found in standard single-phase residential HVAC equipment. The compact oval body measures approximately 2.806 inches in length, 1.806 inches in width, and 3.5 inches in height, making it compatible with most OEM capacitor mounting locations in condensing unit control compartments.
Designed as an OEM-style replacement dual-run capacitor for residential and light commercial split-system air conditioners and heat pumps requiring a 20/15 MFD, 370-volt oval capacitor.
Capacitor replacement is performed by licensed HVAC technicians. Always disconnect and lock out power to the condensing unit before opening the control compartment. Capacitors can retain a dangerous electrical charge even after power is removed — discharge the capacitor through a resistive discharge tool before handling. Follow NEC guidelines for low-voltage and line-voltage wiring practices when reconnecting terminals.
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