Display shows dO; door alarm sounds even when doors appear closed.

Step 1: Confirm door closure

• Open and firmly close each door and drawer one at a time.
• Listen for the interior lights turning off when doors are closed; if lights stay on, the switch is not being actuated.

Step 2: Inspect door switches

• Locate the door switch (usually in the top frame or side wall).
• Press the switch manually with the door open; the lights should turn off and the alarm should stop.
• If pressing the switch works, the door may be misaligned or the gasket may be preventing full closure.

Step 3: Check hinges and alignment

• Inspect top and bottom hinges for sagging or looseness.
• Tighten hinge screws and adjust door height if necessary so the door fully engages the switch.

Step 4: Replace faulty switch

• If the switch does not change the lights or alarm when pressed, disconnect power and replace the door switch.

When to call a technician: If door alignment requires cabinet adjustments or if multiple switches are involved, professional service may be easier and safer.