I have a Lennox G14Q3 propane furnace (forced air). I used the Nest/furnace setup last winter without any problems with just the W and R terminals. But, these summer days I would like to push air through the house with the blower (without heat) and remove it with my HRV system.
I’ve tried hooking up the terminal G to the G terminal on the Nest (for the fan). But the Nest can’t seem to turn it on.
Note: When I test the heat with the Nest, my furnace goes through it’s standard cycle of heating up then turning on the blower.
Also, I can’t seem to get the blower going down at the furnace by shorting R and G, shouldn’t that work?
EDIT 2: I realized that ACC isn't actually connected to anything. It gets 120VAC when I switch the relay, but there is still no path to the blower to be energized. Could I just take one of the speed wires from the blower motor and connect it to ACC so that it acts as an indoor blower?