I had an AC guy tell me that the government efficiency requirements drove the manufactures to make concessions such as lighter components which had shorter life spans.
That may be, but in the RV world, I am more likely to believe it was a price-driven decision. One thing I can say is a soft-start is definitely a good idea.
I am so sick of the throw-away culture.
These classes are pretty good, I'm picking up a lot of information. Frankly, most of it is available on my favorite university platform (google/youtube) but the trouble is sorting out the chaff. Some SO many people give bad advise. One guy who demo'd wheel bearing packing on his channel, with absolute sincerity, failed to preload the bearing --- leaving it nut just finger tight. HUGE step missing there! Now, he did correct it a couple videos later -- and I'm not sure he even drove on it. But if you took his advise without knowledge, you could be in serious trouble
This leads to the most significant part of the training...simply knowing how they are assembled and how the signal flows, what can interrupt it etc.
Every tech/instructor I have talked too told horror stories of "Mr. Putterbutt" who learned from youtube video, probably titled "If your fridge does this, do this to fix it" which may have fixed that persons problem, but would be utterly pointless to thes same symptom without diagnosis because several things can cause that failure mode. Then, when it didn't work, they reassemble incorrectly making a total mess.
So, most of what they teach is how 'signal' flows --- that signal could be AC 120v, DC 12v, propane or airflow...you trace each of these to where the signal stops, and then you've found the failing part. Plus, you need to watch out for multiple signal failures. Its all pretty basic "how to diagnose" stuff. Break the circuit in half --- then in half again.
I used to be much better at this than I am now --- mostly because of 50 years of being away from 'simple' stuff. I've gotten a few object lessons in "Did you check the fuse?" or checking polarity of the 12 volt. As the great philosopher 'Homer' puts it... "D'oh!"
But --- In every one of those cases the next thing I worked on, those simple things have become the first thing I check -- which is the point of training.
Next week is Furnaces and Water heaters --- both of which are pretty simple devices. Then 'exterior' which gets into slides, steps, awnings...all those things outside the RV. Then the big certification test. I can not get to that day soon enough.