Chosen Solution
Replacing the Logic Board is fairly easy on this Mac. You can use the guide below for a walkthrough on replacing it. The required tools are listed on the guide too. MacBook Air 13" Early 2015 Logic Board Replacement You will also need to re-apply thermal paste too. I included a link to thermal paste and thermal paste remover and I also included a link on how to re-apply thermal paste Arctic Silver ArctiClean Arctic Silver Thermal Paste How to Apply Thermal Paste
Use ic Diamond it’s way better!