My opinion, your repeated issues w/ Trane equipment probably goes back to the installing contractor. It is NOT like buying a car. A car comes assembled, gassed up & ready to drive. Your system comes as a box of parts which the installing contractor can either make or break your system. Sounds like you've had many issues w/ equipment over the years. Very sad but I feel your gripe should be redirected at the installing contractor. Did he follow proper installation procedures? Did he evacuate the system? Have you had to periodocally recharge the system due to a leak?
Now you are missing time off work because the independent contractor failing to perform accurate diagnosis & this is Trane's fault?
You need to pick better qualified contractors.
You could insert "Carrier" in this thread if you don't carefully choose your contractor.