The Genie 19988A.S Capacitor is an OEM motor start capacitor rated at 70 microfarads (70 MFD), designed for Genie 1/2 HP AC motor garage door openers. This replacement part provides the brief surge of phase shift needed for the motor to start under load, helping resolve symptoms such as a humming opener, slow or stalled door movement, or intermittent starts. Engineered to match the original component inside the opener head, it supports reliable starting torque and consistent performance in residential garage applications.
This 70 µF garage door opener capacitor is intended for Genie 1/2 HP AC models that specifically call for a 70 microfarad start capacitor; it is not used on DC motor openers. Verify compatibility by checking your opener’s service label, manual, or the value printed on the existing capacitor for “19988A.S” or “70 MFD/µF,” and match the voltage rating noted on your original part. Installation typically involves disconnecting power, removing the light lens or cover, accessing the control compartment, transferring the two quick-connect leads to the new non-polarized capacitor, and securing it in the factory holder; no programming is required when only the capacitor is replaced. For safety, disconnect power and discharge the old capacitor before handling. This genuine Genie replacement helps restore proper starting performance and is a practical repair for many 1/2 HP AC motor models that specify a 70 µF start capacitor.