A good repair replaces defective parts using factory equivalents and doesn't change the electrical or mechanical design of a machine.
A bad repair replaces defective parts with whatever is cheapest. Bypasses safeties like pressure controls. Re-arranges factory wiring and refrigeration piping either for the sake of speed or because of an inability to properly diagnosis the original problem.
The result of enough bad repairs is a reduction in efficiency and a shortened life expectancy.
Luxaire always installs and repairs equipment properly with the right diagnosis, parts and technical knowledge.