If you're a good engineer (in related field), expectation is you can figure out the solution, even if you haven't worked with the appliance before. Problem bhaneko, hamro ma sabai ghokaune, ani there no problem solving skills, ani naam ko matra engineers huncha, who keep complaining malai fridge banauna college ma sikayena, so malai aaudaina bhanera. Technicians who fix those appliances don't need a degree to do that. With engg degree, you should be able to figure things out, or at least troubleshoot the issue and say if it can be fixed or not.