And if you attempt to replace the capacitor. pull all fuses and shut off the breaker. Grab a well insulated screwdriver, only holding the plastic of said screwdriver, and touch the FAN tab on top with the COM, and stand by for a huge "zap". you won't hurt yourself, but you are discharging it. Next, touch the HERM to the COM, and may hear another discharge of electricity. finally, touch all 3 tabs with the screwdriver to ensure the capacitor is completely discharged. Once done, it is now safe to remove.