Today I arrived to Ms Dobbs property and performed the ac maintenance. I noticed disconnect was charred from back feed. I recommend replacing disconnect and adding surge protection. I checked pressure and temperature on the unit an noticed system was undercharged. The club member agreed she had someone to recharge her unit with roughly around 4lbs. I advised her to get a leak detector test to help resolve the situation. I also informed Ms Dobbs she needs to replace her Contactor on the condensing unit do to the loud buzzing noise I approached the attic and noticed mastic missing around air handler that needs to be replaced. Ms Dobbs wants everything fixed she needs someone to give her a call.