Good afternoon, I would like to ask the foristas for advice on the following problem: I have a small business that has a few decades, in it there are 4 refrigerators that use Copeland semi-hermetic engines that will be at least 20 to 30 years old, as they can be repaired they have been repaired, recently in my country (Venezuela) among the strong An economic crisis has also occurred a tremendous electricity crisis that brings with it recurring dips and increases in power and voltage, bringing huge compressor repair costs. Now I see that a Hermetic compressor although it is not repaired (although there are people who repair them) cost a fraction of a hermetic one, and it is where I enter a crossroads where their advice would be worth, and I have thought if it is not better to change those compressors for airtight that should be less noisy, hot and bulky or leave the semi-hermetic that can be repaired. Would it be worth changing the compressors? Thank you very much in advance for your time and answers. PD: For the dips and rises of voltage install proitectors and for the power some supervisors.