NHTSA Complaint #11600273 — 2019 FORD F-250

a/c blower fan blowing irregular cutting out and returning to blow. eventually stopped and replaced the blower, still not working. took to local mechanic pressed on fuses and relays and blower worked for a day. took to another shop to get second opinion and to repair issue. same thing checked fuses and said vehicle was working as planed. 1 day later same issue no air. returned to same shop to re investigate issue, claimed wiring harness and fuse box under hood to be replaced. (remove dash, remove freon, flush system, refill with freon, run wiring around front of engine compartment, reinstall all the above for 6k) all of this for a melted fuse (#43) and a possible burnt wire. if new harness is same gauged wiring, then what is stop from another burning issue? picked up truck for another opinion to repairing or replacing harness. at this time still no air and worried it may start a fire from burning again.