Generac 077220A/G077220A Standby Lower Transfer Switch Coil for 100A RTS series transfer switches.
This solenoid coil is normally damaged by conditions that cause low standby generator voltage to burn up the lower transfer coil. Could also be damaged by a bad limit switch. Cause should be investigated before replacement so that new coil is not damaged during transfer.
If the damage is extensive enough, you can order a complete 100A contactor assembly here: Generac 0L2910/0C2237 Complete 100A Transfer Contactor Assembly
Was used in all of the 100A Generac/Honeywell R series switches including:
RTSC100A3, RTSW100A3, RTSX100A3, RTSD100A3, RTSJ100A3, RTSY100A3, RXSW100A3, RTSR200A3, RTSG100A3, RTSK100A3, RTSM100A3, RTSQ100A3, RXSK100A3, RTSM100A3, RXSM100A3, and many others!
Generac replacement parts will also usually fit the following Generac branded generators: Honeywell, Guardian, Siemens, Carrier, Watchdog, Centurion, Eaton & Bryant.
If you need Generac generator troubleshooting support, please visit our interactive forum