After diagnostics we found out the problem.
The convection heater of the oven was defective.
After replacement the oven continued to please the hostess.
Checked.
Warranty.

The freezer does not freeze well.
The problem is in the blower fan of the freezer compartment.
After replacing the fan, the problem is solved.
Test.
Warranty

The washing machine does not close the hatch.
Does not start.
After replacing the door lock, operation resumes.
Check
90 days warranty on parts.

Sometimes the refrigerator would stop working. The problem turned out to be a faulty difrost timer.
The difrost timer was replaced.
Fridge is working again.
Test.
Warranty.