Primary Fan (Electric), Secondary Fan (Electric)
Stage Y1 Y2 W1 W2 O B G
1st Stage * *
2nd Stage * * *
• The switch in the fuel position causes the Thermostat to deactivate the “G” fan relay, allowing
the furnace to control the fan.
• The switch in the electric position causes the Thermostat to activate the “G” fan relay, allowing
the Thermostat to control the fan.
Conventional Stage: Cooling
Primary Fan (Fuel), Secondary Fan (Fuel)
Stage Y1 Y2 W1 W2 O B G
1st Stage * *
2nd Stage * * *
Primary Fan (Electric), Secondary Fan (Fuel)
Stage Y1 Y2 W1 W2 O B G
1st Stage * *
2nd Stage * * *
17
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