The KF2801Vi is one of Miele’s most widely installed fully-integrated refrigerator-freezers, built around PerfectFresh drawers that hold produce at a precise, near-zero temperature and humidity level. When a sensor drifts out of calibration, the display reports a numbered error rather than leaving you guessing which drawer or zone is affected.

The KFNS37692iDE is part of Miele’s premium MasterCool column lineup, typically installed alongside a matching freezer column for a full side-by-side layout. Because each column runs its own independent cooling circuit, a problem in one column’s electronics doesn’t normally affect the other.

It’s not only risky to handle refrigerant yourself — without EPA certification, doing so is against the law in most cases. Here’s what that means for your refrigerator.