I could not figure out what was wrong with the HVAC unit

I literally could not figure out what was wrong with that HVAC unit, & I was afraid that I was going to have to ask the owner of the HVAC contractor to check out the HVAC unit. I have been an HVAC worker for a long time, & I have been fixing HVAC units for a long time. I am the main HVAC service worker at the HVAC contractor, so when people call our HVAC contractor because they have a broken gas furnace or a/c, I am the woman that they call to repair their HVAC unit. Before today, I have never had trouble fixing an HVAC unit, but today, I had a lot of trouble. Someone called the HVAC contractor a few afternoons ago & told us that they were having trouble with a central a/c. Apparently, they had called another HVAC contractor before, & that HVAC contractor sent out multiple HVAC workers over a period of 1 week. Apparently, these HVAC workers could not figure out what was wrong with the HVAC unit, & 1 of the HVAC workers recommended calling our HVAC contractor. I am aware of this HVAC contractor, & I didn’t suppose much of it. I figured that I would not have a lot of trouble with the central a/c. However, when I took apart the central a/c, I could not figure out what was wrong with it. Sure, I could have just started replacing parts, but that would have been expensive & unethical. I spent the entire day looking for the problem, despite the fact that I couldn’t suppose of it. I thought that I was going to have to call my boss, despite the fact that I would have truly gotten yelled at! Finally, I figured out the problem, & it turned out to be super easy.
ductless HVAC