Display shows E14 and the unit beeps continuously or shows a general system fault without clear cause.

Safety: Disconnect the Blastcool wine cooler from mains before touching the control board or wiring.

• Power cycle: Leave the unit unplugged for at least 15 minutes to allow capacitors to discharge. Reconnect and see if E14 clears.
• Inspect PCB visually: Remove the rear or top access panel to expose the main control PCB. Look for burnt components, bulging capacitors, or darkened areas.
• Check all peripheral loads: Disconnect non-essential loads one at a time (fans, lights) and power up briefly to see if E14 disappears, which could indicate a shorted peripheral.
• Verify supply voltage: Ensure the incoming mains voltage is within Blastcool specifications and that there is a proper earth connection.
• Replace main PCB if necessary: If the board shows visible damage or E14 persists with all peripherals testing good, install a new Blastcool main control PCB matched to your model.
• Reprogram settings: After PCB replacement, set temperature zones and any special modes according to the user manual.

Because PCB replacement involves handling live-voltage circuits, consider having a qualified technician perform this repair.