Samsung Washer E93 Error Code: Causes and Fixes

The E93 error on your Samsung microwave indicates a communication error between the control board and the inverter board. This typically requires professional diagnosis and repair of internal electronic components.

What the E93 error means

The E93 error code signals that the main control board cannot properly communicate with the inverter board, which regulates power to the magnetron. This communication breakdown prevents the microwave from heating food and usually indicates a failed electronic component, damaged wiring, or a faulty connection between these critical boards. Unlike simple user errors, this code points to an internal electronic malfunction requiring technical expertise to resolve.

Common causes

• Failed inverter board that cannot send or receive signals from the control board
• Defective main control board with damaged communication circuits
• Loose or corroded wire connectors between the control board and inverter board
• Power surge damage to electronic components affecting signal transmission
• Worn or damaged wiring harness creating intermittent connection issues
• Manufacturing defect in the inverter or control board circuitry

How to fix the E93 error

1. Perform a hard reset: Unplug the microwave from the wall outlet for 2–3 minutes to discharge residual power. Plug it back in and test if the error clears. This can sometimes resolve temporary electronic glitches, though it rarely fixes persistent E93 errors.
2. Check the power supply: Ensure the microwave is plugged directly into a dedicated wall outlet, not an extension cord or power strip. Verify the outlet provides proper voltage (120V) and the circuit breaker hasn’t tripped. Inadequate power can cause communication errors.
3. Inspect for visible damage: If you’re comfortable doing so, unplug the unit and remove the outer cabinet to visually inspect wire connections between boards. Look for loose connectors, burnt wires, or obvious damage. Do not touch capacitors or internal components without proper training.
4. Test the inverter board: Using a multimeter, a qualified technician can test the inverter board for proper voltage output and continuity. If the inverter shows no output or irregular readings, it needs replacement. This costs $150–$250 including parts and labor.
5. Replace the main control board: If the inverter tests good, the main control board is likely faulty. A technician will need to install a replacement control board, which typically costs $200–$350 including parts and labor.
6. Consider replacement vs. repair: If your microwave is over 7 years old or repair costs exceed 50% of a new unit’s price, replacement may be more economical. New Samsung microwaves range from $150–$600 depending on features.

FAQ

Can I fix the E93 error myself?
Basic troubleshooting like unplugging the unit is safe, but repairing the inverter or control board requires technical knowledge and working with high-voltage components. Microwaves retain dangerous electrical charges even when unplugged. For safety and warranty reasons, professional repair is strongly recommended.

How much does it cost to repair an E93 error?
Professional repair typically costs $150–$350 depending on which board needs replacement and your location. The inverter board averages $150–$250, while control board replacement runs $200–$350. Get a diagnostic quote before authorizing repairs to ensure it’s cost-effective compared to replacement.

Is the E93 error covered under Samsung warranty?
If your microwave is within the standard 1-year parts and labor warranty, the E93 error repair should be covered at no cost. Samsung may also honor repairs for manufacturing defects slightly beyond the warranty period. Contact Samsung customer service at 1-800-726-7864 with your model and serial number to verify warranty status before paying for repairs.