Thermostat Wiring to a Furnace and AC Unit - YouTube Click to view5:39Thermostat Wiring to a Furnace and AC Unit! Color Code, How it Works, Diagram! How to Read AC Wiring Diagram - Duration: 1:25:48. Word of Advice TV 45,485 views. 1:25:48.Author: AC Service Tech LLCViews: 96K Wiring Diagram for Mobile Home Furnace | Free Wiring Diagram Variety of wiring diagram for mobile home furnace. A wiring diagram is a streamlined conventional photographic representation of an electrical circuit. It reveals the elements of the circuit as simplified shapes, and the power and signal links between the gadgets. Coleman Mobile Home Gas Furnace Wiring Diagram | Free Variety of coleman mobile home gas furnace wiring diagram. A wiring diagram is a simplified standard pictorial representation of an electric circuit. It shows the parts of the circuit as simplified shapes, and also the power as well as signal connections between the devices. How to Wire 110V for a Furnace | eHow The blower and control circuit for a modern gas furnace uses its own 110 to 125 volt circuit breaker. A single sheathed cable runs from the circuit breaker to a single-pole light switch located next to the furnace. The switch connects to the furnace inside a wiring box.