Understanding Thermostat Wiring

What color is the wire connected to the heating system?

• None of the above

• Green

• Yellow

• White

Which wire connects to the air conditioning compressor?

• Rc wire

• G wire

• Y wire

• W wire

What color is the G wire?

• Red

• Blue

• Yellow

• Green

What do the Rc and Rh wires represent?

• Power source for the thermostat

• Fan connection

• Heating system

• Air conditioning compressor

What is the common color for the wire that connects to the fan?

• Green

• White

• Blue

• Red

How many wires are most commonly seen in thermostat configurations?

• Four

• Two

• Seven

• Five

What is the difference between B and C wires on a thermostat?

• There is no difference

• B is for battery, C is for current

• B is for boiler, C is for cooling

• B is for blue (cooling), C is for common

Which wire is typically used for the 24-volt common connection?

• Red wire

• White wire

• Blue wire

• Green wire

What function does the Y wire serve in a thermostat configuration?

• Controls the fan

• Signals the air conditioning unit

• Provides power to the thermostat

• Connects to the heating system

Which color is commonly used for the wire that provides power to the thermostat?

• Red

• Blue

• Yellow

• Green