dO Moderate Easy DIY

Samsung Dryer dO — Door Open Error

Samsung Dryer · Error code dO

What dO Means

Cycle won't start because the door is sensed as open. If the door is physically closed, the door switch or strike is the culprit.

Symptoms

  • dO on display
  • Won't start a cycle
  • Door visually shut
  • Latch feels normal

Common Causes

1
Door not fully latched

Bedding or stray item blocking the seal.

2
Bent door strike

Strike not engaging switch plunger.

3
Failed door switch

Plunger stuck or contacts worn open.

4
Loose door switch harness

Connector disengaged at switch.

How to Fix It

  1. Open the door, remove any obstructions, and close it firmly until you hear a click.
  2. Inspect the door strike on the cabinet — straighten if bent.
  3. If dO persists, remove the top panel and verify the door switch harness is connected.
  4. Test door switch continuity — replace if it doesn't toggle when pressed.
  5. Replace worn door bumpers if the door doesn't seat squarely.

Parts You May Need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

Common replacement Door switch View on Amazon→ Common replacement Door strike View on Amazon→

More Samsung Dryer Codes

3C 3C Error — Motor Error 9E1 9E1 / 9C1 — Power Supply / Voltage Error AC AC / AE — Communication Error Between Boards bE bE / bE2 — Button / Key Stuck C8 C8 — Lint Filter / Vent Reminder C80 C80 / C90 — Vent Blockage Detected

All Samsung codes → All dryer codes →

Verified against manufacturer documentation: samsung.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.