Dead unit replaced user interface tests good

Complaint is that the oven bakes uneven, doesnt hold temp and takes a long time to get up to temp. I ran it for 30 minutes on bake at 350 after testing bake and broil to make sure both elements work, which they do. Within 13 minutes it reached 350, and then it held temp for the next 17 minutes. Everything working perfectly and to spec.

Giving an E8F4 error. Found water in the flood basin, which happened when she opened the door as the dishwasher was running. Dried it out and now it runs great.

Replaced bad heater. Works great now.

Issue is icemaker leaking. On arrival unit was turned off turned unit on cycled icemaker. Unit started to fill no leaks at the water valve or waterlines going into the unit itself. That unit run for about 30 minutes never got a leak. I see some signs of leakage, but it is too hard to know without the unit being running on arrival. Could be a icemaker leaking. It be not getting cold enough or defrosting and melting the ice and leaking. This does not have a drain pump or drain line it just goes into a bucket. Let them know that they let run but keep an eye on it cause it is a leak complaint. Call landlord to try to get a little bit more information about the unit, but they did not answer so I have nowhere to go from here.