Performed cooling tune up on 2 systems. Flushed drain lines and cleaned condenser coils. Checked all major components. Wrapped condensers to perform cold weather check. System 1 downstairs: Found 30amp outdoor disconnect broken, handle missing and plug is fused to contacts. Recommend replacing disconnect immediately. Condenser fan motor has signs of corrosion. Found floor drain is backing up, may need plumber out to clear drain. No surge protection. System is 14 years old. System 2 upstairs: No surge protection for outdoor unit or indoor variable speed motor. System is nearing end of eligibility for extended warranty. Recommend 10 year parts and labor extended warranty. The system is operating properly at this time. Water heater: Unable to flush water heater because customer said valve is broken and cannot be opened or it will leak. Water heater is 15 years old. Recommend replacing water heater.