Is it normal for a brand new refrigerator to have ice build up?

Is it normal for a brand new refrigerator to have ice build up? I bought a BRAND NEW Panasonic NR-BP9417Q 2-door refrigerator 3 weeks ago. It's NOT a non-frost refrigerator but a semi-automatic defrost where a button is pressed and it will shut off the compressor and let the ice melt by itself. Another option would be to just unplug it from the wall outlet.
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Guest [Entry]

If the freezer has a lot of frost or ice built up and the fresh food section is warm, and the freezer is fine, the problem is in the defrost circuit. All the ice is blocking the cold air to tge fresh food section. If you thaw the refrigerator by turning it off and leaving the doors open for 2 days, it will work fine for about 2 weeks, until the ice builds up again. To determine which componant failed, you’ll need to test ohms on tge heater, sensors and defrost thermostat with a multimeter or schedule a service call.