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The Mars 14291 is a dual run capacitor rated 50/7.5 MFD. One canister holds the 50 MFD section for the compressor and the 7.5 MFD section for the condenser fan motor, replacing two separate capacitors in a split-system AC or heat pump. It is a common rating for residential condensing units, and MARS is a familiar name in the HVAC trade. It is a service part for technicians, not a DIY upgrade: the rating must match the original capacitor exactly.
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The Mars 14291 is a dual run capacitor rated at 50/7.5 MFD (microfarads). It supports continuous operation of both the compressor and the condenser fan motor in a split-system air conditioner or heat pump. The 50 MFD section serves the compressor, and the 7.5 MFD section serves the fan motor.
A dual run capacitor combines two capacitance values in one cylindrical canister. This replaces two separate run capacitors with a single part and takes up less space in the electrical section of the condensing unit.
It is an OEM-style replacement for residential and light-commercial split-system condensing units that call for a 50/7.5 MFD dual run capacitor. Before installing, check that the MFD and voltage ratings match the original unit nameplate. Installation should be done by a licensed HVAC technician. Disconnect and lock out power first, and discharge the old capacitor before removal, since stored voltage can remain after shutdown.
