Arrived on site to check out the system because it randomly trips the circuit breaker. Upon arrival I open the control compartment at the condenser and found that there was a rodent nest on the bottom of the cabinet, I cleaned it out and found the high voltage wires are chewed through. We will need to replace the wires from the disconnect to the contactor and we will also need to replace some of the wiring inside the control compartment because it was also chewed through. I spoke with the homeowner about performing a maintenance on the system as it has not had one performed, he would like information on our maintenance agreements and I also mentioned that with the agreement he would receive a 20% discount on the repair.