I have an American Standard freedom 90 comfort R furnace model AUY080R9V3W5 which is a high efficiency 2 stage with dc motor. An Aprilaire 550 humidfier is hooked up to it. The humidifier only comes on if the furnace is on stage 1. It stays off if it kicks into stage 2. The thermostat is a top of the line honeywell which controls both stages.
The wires from the humidifier are wired to "W1" and "B/C" on the furnace. Is there no way to wire it so that the humidifier comes on for both stages ? I came across something in the manual stating that there is a jumper lead on the circuit board but I can' t see it.