Upon arrival tech talked to home owner tech found that after a power outage she heard a loud ear piercing noise tech was unable to find anything to make the noise there is a alarm system in the house that home owner said it was no longer in use. Tech believes the noise came from that there is no indication at this time that the noise came from the water heater or air handler. Office needs to call in morning and confirm call for the 8th in the afternoon for a electrician to install a surge pro