Wine cooler does not cool at all; interior stays at room temperature and compressor or Peltier module is not running.

Safety first: Unplug the cooler before testing electrical components. High voltage is present in the compressor circuit.

Steps to diagnose no cooling:

• 1. Confirm power: Verify the outlet works by plugging in another device. Check that the cooler's power cord and plug are intact.
• 2. Listen for operation: After plugging in, listen for the compressor hum or fan noise. If completely silent, suspect the control board or power circuit.
• 3. Check control settings: Ensure the unit is not in standby mode and that the set temperature is below room temperature.
• 4. Inspect compressor start device (compressor models): Remove the rear cover and locate the start relay/overload on the compressor. Remove it and shake gently; if it rattles or shows burn marks, replace it with a Vinotemp-compatible start device.
• 5. Test Peltier module (thermoelectric models): Measure resistance across the module; replace if open or shorted.
• 6. Check for blown thermal fuse: Some models include a thermal fuse in series with the cooling module. Test for continuity and replace if open.
• 7. Replace main control board: If the compressor or module and start components test good but never receive power, the control board is likely faulty.

Warning: Compressor replacement and refrigerant handling must be done by a licensed technician.