I have an issue with my humidifier not working correctly. When the heat kicks on, and the furnace kicks into blower mode, the humidifier wheel does not spin I think due to a faulty motor that is mounted on the outside of the humidifier. Because all the humidifier box does is just get really warm with the hot air passing through instead of humidifing the air as the furnace is on. What would be the easiest thing to do, just but a whole new aftermarket humidifier and install it or replace the motor that spins the spindle(wheel) ??? I would like advice on what to do and where online or local hardware stores might have the parts mentioned. Thanks for your help.