In another lifetime I was an HVAC repair tech.....Many so called technicians are not, repeat, not school trained. My experience was in home and commercial repair. If one does not go to a HVAC school for 18 months, he or she does not know a darn thing. All the working parts of an HVAC system where I went to school were studied in detail. Not only studied, but in a working environment we had to trouble shoot each part, write a paper on it, draw a diagram of that part in the system and explain what was going on verbally to the instructor...Long story short, in my class, we started with 15 students, and finished with 3...it aint easy McGee.
Without being thoroughly trained on how parts work and how to use the test equipment, the non trained tech is a waste. If you take your truck to a dealership to be worked on, ask for the technicians copy of the graduation certificate, if he or she does not have one,,,,,run Forrest run.
Do you know how a condenser, evaporator, compressor, transformers,pressure regulator, works? You need to know how Suction pressure, head pressures, line filters, and all the different kinds of Freons act under temperature changes? Can you put them all together and make them work? Can you hook up the machine that pulls a vacuum on the system and determine where any leaks are located? Did I mention dye injection and can you braze copper lines correctly and on and on....you see , thats why it takes 18 months and tons of books and more books.....
