KitchenAid Refrigerator Defrost System Fault

A defrost system fault means the automatic defrost cycle isn’t melting frost off the evaporator coil, which lets ice build up until it restricts airflow. The most common cause is a failed defrost heater.

If the unit still feels cold, short-term yes, but check food temperature with a thermometer if you’re unsure, and don’t wait long to have it looked at.

The checks above are safe to try, but confirming the cause — sensor, compressor, or sealed system — requires testing tools an owner typically doesn’t have.

It varies widely depending on the cause, confirmed in writing after the on-site diagnostic.

Food safety is the main concern — if the unit has clearly stopped cooling rather than just running a little warm, treat it as time-sensitive.

Sometimes, if dirty coils were the actual cause — it’s worth doing regardless since it’s safe, free, and rules out the easiest cause first.