Started off with upstairs unit the one with issue upon arrival. I hosed down condenser coil of any dirt and debris. Opened condenser cabinet and checked everything thoroughly. Starter (good), fuses (good), motherboard (good), dual secondary motor control (good), 24v (good), 120v (good), refrigerant levels (need refrigerant) sh 30, sc 2, osa 84, delta 22. Then went onto the furnace and checked furnace cabinet thoroughly. Blower motor (good), single secondary motor control (good), motherboard (good), 24v (good), 120v (good). I replaced dirty air filter, I replaced fuse that was blown at the disconnect box. I also replaced fuse at motherboard at furnace. After replacing and maintaining system the house cools great and ready for summer. Started off with hosing down condenser coil of any dirt and debris. Opened condenser cabinet and checked everything thoroughly. Starter (good), fuses (good), motherboard (good), dual secondary motor control (good), 24v (good), 120v (good), refrigerant lev