Oil Furnace Error Codes

Really appreciate your help getting through this.

Now it's time to learn how to install a sub panel because I'm pretty sure this isn't up to code

 

Sub panel will be a piece of cake compared to troubleshooting the oil furnace. Easy logical progression after answering the first question. Is my goal to burn the house down or make it safer?

 

Wow. I've seen worse, but can't remember when.

 

In my defense, there's a lot of devices that need power inside of that tent.

To be honest, the subpanel wouldn't make the wiring significantly less messy; it'd mainly allow me to run 3 1Ks instead of the 3 600s that I'm currently running (5x10 tent).