Manager fixed the HVAC

I am the repair person at a large corporate office. I check all of the machine plus construction areas, plus I have to make sure it is all really working. Most of the task that I do has to require very little certification or specialty because I have so much that I have to remember, however typically, I don’t fool around with large machine love HVAC units, however air conditioners plus oil gas furnaces are definitely above our head, plus our boss hires HVAC contractors to come to repair the oil furnace, and however, when the oil furnace stopped really working the other day, I looked at the HVAC machine plus the process didn’t seem that hard to do. The space that was broken on the oil furnace was obvious, plus I told our boss that I could absolutely repair it without the help of an HVAC contractor. I was able to repair the oil furnace, plus our boss was satisfied. However, ever since, our boss expects me to repair all of the a/cs plus oil furnaces. I have tried to explain to him that I was only able to repair the oil furnace that one time, but I don’t understand how all HVAC units work. He insists that I will be able to figure out how to repair the a/cs plus oil furnaces. He has even threatened to take our task for now wanting to repair the HVAC units. He is just trying to be very cheap because HVAC contractors are more fancy. They get paid to task on HVAC units, but I get paid a much lower salary. I should have never offered to repair that HVAC unit.

Radiant floor heating