Maybe you just misspoke but you can't "supply more current with the higher resistance". Ohms law. Higher resistance means lower current. And, you don't supply current, the device draws it based on ohms law. You can increase current by increasing voltage or reducing resistance. Again, by ohms laws.
V=IR, not just a good idea, it's the law.
Definitely mis-spoke, rocking a nasty cold lol.
The a1321 heater element is of higher resistance.
To be certain, are you trying to convert from the type of heater that has the thermocouple sensor.
Correct.
Looking at the "a1321 compatible" board on banggood/ebay. These are pretty much identical, so I know it can be fixed to work good with the a1321, I just lack any formal training.
I need a new multimeter though, my old one is unreliable and new one does wonky stuff when I put it on AC.
With this cold, i'm wiped and don't feel like looking up resistor band markings off a picture to reverse engineer the boards from banggood/ebay.
I've watched many op amp videos but things are not sinking in, so time to put it aside until I feel better.
EDIT:
So basically what the issue is, is that the heater circuit is always on, LED is always on, tip gets warm but not hot enough.
I think the tip is getting about 1.x volt, which seems really low.(could be my multimeter)