Samsung Washer 43 Error Code: Causes and Fixes

The E-43 error on your Samsung Microwave means there is a communication failure between the control board and the touchpad or user interface. This error typically requires checking the connections and potentially replacing the control panel assembly.

What the E-43 error means

The E-43 error code indicates a communication breakdown between the main control board (PCB) and the touchpad control panel on your Samsung microwave. This error prevents the microwave from receiving input commands from the control panel, rendering it unable to operate. The issue typically stems from loose connections, corroded contacts, or a faulty control panel assembly that needs to be addressed to restore normal function.

Common causes

• Loose or disconnected ribbon cable between the touchpad and main control board
• Corrosion or dirt buildup on the ribbon cable connector pins
• Damaged or worn ribbon cable from repeated door opening and closing
• Failed touchpad control panel assembly
• Faulty main control board (less common)
• Power surge or electrical spike damaging communication circuits

How to fix the E-43 error

1. Power off and unplug the microwave — Disconnect the microwave from the electrical outlet and wait at least 5 minutes to allow capacitors to discharge safely. This prevents electrical shock and also performs a hard reset that may clear temporary glitches.
2. Access the control panel assembly — Remove the screws securing the outer cabinet or control panel cover (typically located on the top or sides). Carefully pull the control panel forward to access the ribbon cable connection between the touchpad and main control board mounted inside.
3. Inspect and reseat the ribbon cable — Locate the flat ribbon cable connector on the control board. Carefully disconnect it by releasing the locking tab or clip. Inspect both the cable and connector for dirt, corrosion, or visible damage. Clean the contacts with electrical contact cleaner if needed, then firmly reconnect the cable ensuring it’s fully seated and locked in place.
4. Check for cable damage — Examine the entire length of the ribbon cable for cracks, tears, or worn areas, especially where it flexes. If the cable shows any damage, it must be replaced. Order a replacement ribbon cable or complete control panel assembly using your microwave’s model number.
5. Test the microwave — Reassemble the control panel cover, plug the microwave back in, and test its operation. If the E-43 error clears, the issue was a loose connection. If the error persists, the touchpad assembly or main control board likely needs replacement.
6. Replace faulty components — If reseating the connection doesn’t resolve the issue, order and install a replacement touchpad control panel assembly (most common failure) or main control board. The touchpad assembly typically costs $50–$150, while control boards range from $100–$200. If repair costs approach 50% of a new microwave’s price, consider replacement instead.

FAQ

Can I reset my Samsung microwave to clear the E-43 error code?
Yes, you can try a hard reset by unplugging the microwave for 5–10 minutes, then plugging it back in. This clears temporary communication glitches. However, if the E-43 error returns, there’s a physical connection or component problem that requires inspection and repair.

Is it safe to use my microwave with the E-43 error showing?
No, you cannot use the microwave when the E-43 error is displayed because the control panel cannot communicate with the main board to operate the unit. The microwave will not respond to any button presses until the error is resolved.

How much does it cost to fix the Samsung microwave E-43 error?
If the issue is a loose connection, the fix is free (DIY). A replacement touchpad control panel costs $50–$150 plus $100–$200 labor if professionally installed. A main control board costs $100–$200 plus labor. Total professional repair typically ranges from $150–$400 depending on the required part.