[moony]

About a month ago I had a Trane dual fuel system installed along with a Honeywell by-pass humidifier and IAQ thermostat. Because the humidity was too high in the house during the install the humidifier couldn't be tested. The installer assured me it was wired correctly and everything should work fine.

Now that the humidity is down in the house I've noticed that the humidifier only runs when there is a call for humidification and the IAQ shows "AUX Heat On" (furnace). The humidifier does not run when there is a call for humidification and the IAQ shows "Heat On" (HP).

I noticed that the installer did not wire the humidifier according to the IAQ wiring diagram. He wired one side of the humidifier directly to HUM1 on the IAQ. The other side he ran to a transformer located in the furnace and then back up to HUM2 on the IAQ. Could the way it's wired cause the humidifier to only be energized when the furnace is on?