Upon my arrival I checked into the concerns of the comfort control being blank. Performing my diagnostics I found the fuse has popped for the low voltage circuit again. I traced out the wiring and ended up finding somewhere under the house has a bare spot going to ground every now and then on the control wiring heading to the condenser. I am unable to access the area that the control wiring is making contact. I spoke with the customer about my concerns and recommended running new control wiring through the attic and down the side of the home wrapped with liquid tight on the exterior wall. This repair was approved and half payment was collected today. Return will be scheduled for next week with 2 technicians.