Basic Electrical Tip: Before you can troubleshoot HVACR equipment, you need to understand these 3 words: Voltage = the electrical pressure pushing power through the circuit. Current = the flow of electricity. Resistance = anything that slows down or limits the flow. Simple example: Voltage is like water pressure. Current is like the water flowing. Resistance is like a restriction in the pipe. Question for today: Which one do you struggle with the most? A. Voltage B. Current C. Resistance D. Reading wiring diagrams E. Using a meter