Fast Charger not working Note 4

[AC Question]

My note 4 won't fast charge. I have checked all hardware with my wife's note 4 to make sure it's not a hardware issue. When plugged in it will charge but won't fast charge. I've done a cache partition wipe, factory reset and as i said above checked all hardware. When plugged in it will charge but even the drop down box doesn't display that it's charging. Normally it would say fast charger connected or usb charger connected. It's up to date on all software. Please help.