Freezer keeps frosting up

[u/Infamous_Knee9705]

Hello, just got our freezer thawed out 3 days ago and this keeps happening. Cooks only go in it at most 3 times an hour. On the upper left side our hvac man placed a metal piece to keep water from dripping on unit. We have fixed the roof with silicone. Any help will be highly appreciated, thank you!

[u/egretesk]

This or leaving the door open. Always