Performed preventative maintenance for a 2 year old air conditioning system. Inspected all the electrical components. Confirmed proper high and low voltages. Tested the amp draw for the blower, compressor and fan motor. All were operating within the manufacturer specs. Tested the temperature split between the supply and return. System is operating at a 19° differential. Tested the drain and the condensate pump. Drain is clear and pump is working as it should. On arrival I found the water heater relief valve blown dumping water into the basement. Spoke with the homeowner Heather with a quote for a new water heater. She approved the replacement. We will return tomorrow between 9-10am to replace. Air conditioning system is operating properly at this time. No charge due to prepaid maintenance agreement.