Found furnace off on three attempts hard lockout. Tested DC voltage on flame sensor 12.5 DC. Recheck and wire brushed burners and flame sensor. Fire didn’t look like it had a lot of force on it. So I checked gas pressure gas pressure was 1.5 ic. Adjusted gas valve to 3.5.Ic. Tested temperature difference. 60° don’t see any other issues besides the gas pressure that could’ve caused this thing not to fire and lock out.