At One Stop Cooling, we study the readings that technicians record on service and maintenance calls. This allows us to look for technical oversights that technicians should have shared with customers. When we first started doing this, we were surprised with the mistakes that could be found if a weekly sampling of techs’ readings was performed.
Now, I’ll give a sort of spot-check quiz that demonstrates the value of studying your technicians’ readings. Here’s a scenario: A technician arrived at a home and found a bad capacitor. They did not see anything else wrong with this unit, as they only applied the “ballpark rule of thumb” that says a 15° to 20°F split was acceptable. They left the home.