AC Furnace question

[Rob S]

New to me 2021 Zion, (no firefly) furnace works fine on Battery power with the stat set to "Heat" on fairly low temperature right now.

However, when I plug in the shore power and turn the inverter on, the noisy AC Fan comes on right away. I cant tell if it is air only or AC as well.

Is this normal, and if so is there any way to disable this? Is there any speed control for the AC fan?

 

[Rob S]

Found a partial solution on another forum which was to set the fan speed to high, rather than low to prevent this.

It works, but it is very weird that this would happen at all.