Mine are all freshly wire nutted together.
3amp fuse is good.
I am just testing between the 2 output wires on transformer between blue and yellow/green wires
I have a big maxx 50k btu furnace that was working great then one day ..nothing...replaced transformer and new board. Have power coming in...not getting 24v to board?
When i plug furnace in nothing..no light on board, thermostat does not light up.
Any direction would be appreciated!