Read a customer upon arrival. Inform the customer that I was there for a fuse swap, swapping their 30 amp fuses with 25 amp fuses. Turned off the power to the condenser by turning it off at the breaker. Made sure there was no power with multimeter for safety before operating. Removed 30 amp fuses and install 25 amp fuses. Went downstairs and turn the breaker back on for the condenser and turned on the AC to make sure the unit is fully functional. Unit kicked on normally customer acknowledged and signed off.