Thermoelectric (Peltier) Aobosi wine cooler: unit powers on but interior remains warm; only a faint hum is heard.

Safety: Unplug the unit before disassembling the Peltier assembly. Heat sinks can have sharp fins.

• Identify cooler type: Confirm your Aobosi model is thermoelectric (no compressor). These units rely on Peltier modules and fans.
• Check fans: With the rear cover removed, power the unit briefly (if safe) to see if both internal and external fans run. If a fan is not running, unplug and test/replace that fan.
• Inspect Peltier module: The module is sandwiched between two heat sinks. Look for signs of overheating or cracking.
• Replace Peltier module: If fans are good but no cooling occurs, remove the heat sink assembly, clean old thermal paste, and install a new Aobosi-compatible Peltier module with fresh thermal compound on both sides.
• Driver circuit: If a new module does not cool, the Peltier driver on the control board may be faulty and the board should be replaced.