The Bosch EN153 thermostat is a classic example of a small part causing big problems. When it fails in the "closed" position, your refrigerator transforms into an inefficient freezer. When it fails open, you're left with spoiled food and warm drinks.
If the compressor runs non-stop, makes an intense humming sound, but the interior walls remain completely warm, a technician must connect pressure gauges to verify a system leak or a failing compressor motor. 4. Technical Specifications Summary for the Bosch EN153 bosch+en153+hot