I arrived at our clients home for the downstairs unit not cooling properly. I proceeded into the attic and identified the correct unit and found a blown fuse in the system. I proceeded outside and tested the electrical components. Everything tested within range today. I then proceeded to test the low voltage wires and found that the wires sending power from the attic to the outdoor equipment had been compromised somewhere in the wire run. The client is aware of an ongoing rodent issue and there was evidence of rodents in the attic as well as existing traps. I further tested the existing wires to ensure there was a connection that could be made that was not compromised. I made the necessary wire changes to the indoor and outdoor equipment and also replaced the fuse in the attic. I then turned the unit on and ensured it was cooling properly. It had a 20° drop and the filter is in good condition. If the wire is further compromised and no spare wires are available to send power, new th