It wasn't even built right. The builder didn't put the proper trim on the doors to seal it up. If he didn't even do that, you wonder what else is wrong.
I'd give it back to him a search for a different smoker to use.
Yoder Smokers YS1500, Kamado Joe BigJoe & Joe Jr., Weber: 18.5" OT(L), SJG(AU) & (DI) - Past Cookers: Yoder Smokers YS640 Comp Cart, Kamado Joe Classic, OKJoe's Longhorn, UDS, Weber: Performer(AA), Genesis Gold C(DH), 22.5" OTG(DI), 22.5" OT(L)
IMBAS Certified MOINK Baller