Boiler Wiring Diagrams 101 | Symbols, Switches & Fast Fixes

What’s the difference between a 2-hour troubleshooting session and a 2-minute fix?
✅ A wiring diagram. Troubleshooting without a wiring diagram is like flying blind. In this video, we cover how wiring diagrams work, the most common switches and symbols, and how to test limits to build your own reference guide. A must-watch tip for anyone responsible for keeping boilers online.

00:00 – Why wiring diagrams matter in the boiler room
00:26 – The hidden challenge: wires in conduit
00:52 – How a wiring diagram speeds up troubleshooting
01:27 – Example: 2 minutes vs 2 hours troubleshooting
01:44 – Common wiring diagram symbols explained
03:36 – Manual reset switches & safety circuits
05:07 – Different applications: floats, pressure, temp switches
05:46 – What to do if you don’t have a wiring diagram
06:17 – Creating a troubleshooting “cheat sheet”
07:45 – Testing limits: high steam pressure example
08:42 – Building a limit response list for future troubleshooting