The E92 error on your Samsung microwave indicates a communication failure between the main control board and the sub-control board (user interface panel). This error typically requires checking wire connections or replacing faulty control boards.

Error code E92
Meaning Communication error between main and sub-control boards
Severity High — Microwave will not operate until resolved
Time to fix 15–45 minutes
Tools needed Screwdriver set, multimeter, needle-nose pliers

What the E92 error means

The E92 error code signals a breakdown in communication between your Samsung microwave’s main control board (PCB) and the sub-control board that manages the display and user interface. These two boards constantly exchange signals to coordinate microwave operations. When the connection fails due to loose wiring, corroded connectors, or a defective board, the microwave detects the communication loss and displays the E92 error to prevent unsafe operation.

Common causes

  • Loose or disconnected wire harness between control boards
  • Corroded or damaged wire connectors from moisture exposure
  • Failed main control board (PCB assembly)
  • Defective sub-control board or display panel
  • Power surge damage affecting board circuitry
  • Physical damage to wiring from previous repairs or impacts

How to fix the E92 error

  1. Disconnect power and access control boards: Unplug the microwave from the electrical outlet for safety. Remove the outer cabinet screws (typically on back and sides) and carefully slide off the cabinet cover to access the internal components. Locate the main control board (usually mounted on the right side) and the sub-control board behind the display panel.
  2. Inspect wire harness connections: Examine the wire harness connecting the main control board to the sub-control board. Look for loose connectors, damaged wires, or signs of burning. Firmly disconnect and reconnect all wire harness plugs at both ends, ensuring they click securely into place. Check for corroded pins and clean with electrical contact cleaner if needed.
  3. Check for physical damage: Inspect both control boards for visible signs of damage including burnt components, bulging capacitors, or cracked solder joints. Examine wires along their entire length for cuts, pinches, or melted insulation. Replace any damaged wiring harnesses with exact OEM Samsung replacement parts.
  4. Test with power restored: Reassemble the cabinet temporarily (enough to be safe) and plug the microwave back in. If the E92 error persists after reseating connections, the issue is likely a failed control board. Use a multimeter to check for continuity in the wire harness if you have technical expertise.
  5. Replace faulty control board: If connections are secure but the error continues, you’ll need to replace either the main control board or sub-control board. The main control board is more commonly the culprit. Order the correct replacement board using your microwave’s model number, disconnect power, remove the old board (photograph wire positions first), install the new board, and reconnect all wiring exactly as it was.
  6. Consider professional service: If you’re uncomfortable working with electrical components or the error persists after checking connections, contact a qualified appliance technician. Control board diagnosis and replacement requires technical knowledge, and microwaves contain high-voltage capacitors that can retain dangerous charges even when unplugged.

FAQ

Can I reset my Samsung microwave to clear the E92 error?
You can try resetting the microwave by unplugging it for 2–3 minutes, then plugging it back in. However, the E92 error indicates a hardware communication problem that typically won’t resolve with a simple reset. If the error returns immediately, the issue requires physical inspection and repair of the control boards or wiring.

How much does it cost to fix an E92 error on a Samsung microwave?
If the problem is just a loose connection, the repair is free (DIY). A replacement main control board costs $80–$200 depending on your model, while professional repair including parts and labor typically ranges from $150–$350. Given that new microwaves start around $100–$200, consider the age and value of your unit when deciding whether to repair.

Is the E92 error dangerous or can I keep using my microwave?
Do not attempt to use your microwave when the E92 error is displayed. This error indicates the control systems cannot communicate properly, which could result in unpredictable operation, failure to shut off when the door opens, or other safety hazards. Unplug the unit until the problem is properly diagnosed and repaired by a qualified technician or knowledgeable DIYer.