So, I got a question recently and it boiled down to "why I like to hopscotch" when checking for voltage in an air handler, heat pump, etc. I hope that this video will help some of you understand why I personally think the hopscotch method of troubleshooting is a better way than any other way I "thought" I was doing correctly.

This example unit is a single phase, 208/240V air handler with electric heat. You could apply these concepts to a compressor, outdoor fan motor, etc. as long as it is a 208/240V load and has a single switch controlling the circuit. When you start troubleshooting a furnace with 120V, it is a little different or if you had a 2 pole contactor on a 240V compressor.

There is nothing wrong with using your own troubleshooting method...whatever it is...AS LONG AS YOU TRULY UNDERSTAND IT !!!

I think a lot of people don't try to think things through enough and hate to say that they get confused about their own readings from their own troubleshooting.

Truth be told...I was there myself and I finally realized it. Hope it helps you.