For those new to the field, do you find it intimidating when you have to rely on the wiring schematic on a unit to figure out what a device is or what it should do? Or do you sometimes get confused looking at all the endless lines, weird symbols, and acronyms?

         I’ll be first in line to tell you I shared those same feelings when I started my HVAC career. I am going to share some basics to reading Residential Wiring schematics with you in the article. The cool thing is almost all symbols are the same across all brands, and TYPICALLY the details within the symbols have a meaning, but every now and again the symbol will be generic and you will have to add in context clues to determine what they are.

Let’s dive right in… Typical Residential Carrier wirings diagrams resemble this: