Inverter Welder Stuck on High Amps

[Volkommm]

Hi, I've got an inverter based welder, specifically an Amico TIG 160. It does both stick and Tig, but the insides look about the same as every other igbt welder I've seen online.

My issue:
The amps display changes but the actual output doesn't. It feels like it's stuck on super high amperage, and no amount of turning the dial up or down changes anything. 110/220 both exhibit the same behavior.
I've tried unseating the potentiometer leads but I would assume it to be good since the display reads from it, and that changes perfectly fine.

I'm a Mechanical Engineer so I'm not an expert like you all, but I am not a complete novice when it comes to electronics- im out of my league with this one, though. I was having difficulty finding a schematic specific to my model.
The machine runs normally besides the lack of amperage control, any idea what component controls this?
I've attached plenty of images, thank you in advance for any advice.

 

[Ian Rogers]

Invertor welders do not go low current... Mine has a minimum of 50A.. I have no pulse setting so welding smaller plates causes issues.

When I need to weld small I can switch to MAG where I can get down to 16A... ( Still too high for vehicles ) I have been shown how to mimic pulsed, but I just leave that to those who can do it.

Are you trying to weld smaller than 3mm? If so, then your welder may be fine...

 

[Volkommm]

It burns through even thick material right now. I've had this welder for about 3 years and it's definitely stuck on max output. I'm hesitant to spend more money if I can fix this but I do want to upgrade to an AC DC welder for aluminum