The E-44 error on your Samsung microwave means there is a communication failure between the control board and the inverter board. This error typically requires professional diagnosis and repair due to the complexity of internal electronic components.

Error code E-44
Meaning Communication error between control board and inverter board
Severity High — Microwave will not operate until repaired
Time to fix 45–90 minutes
Tools needed Multimeter, screwdrivers (Phillips and flathead), insulated gloves

What the E-44 error means

The E-44 error code indicates that the main control board cannot communicate properly with the inverter board in your Samsung microwave. The inverter board regulates the power supply to the magnetron, which generates the microwaves for cooking. When these two critical components fail to communicate, the microwave’s safety systems shut down operation to prevent potential damage or hazards. This is typically caused by faulty wiring connections, damaged circuit boards, or component failure due to power surges or wear over time.

Common causes

  • Loose or corroded wire connections between the control board and inverter board
  • Failed or damaged inverter board due to power surges or component wear
  • Malfunctioning main control board with damaged communication circuits
  • Moisture damage to electronic components from steam or spills
  • Electrical interference or power supply issues affecting board communication
  • Age-related capacitor failure on either the control or inverter board

How to fix the E-44 error

  1. Power cycle the microwave completely — Unplug the microwave from the wall outlet for at least 5 minutes to allow all capacitors to discharge and the control boards to reset. Plug it back in and test if the error clears. This resolves temporary communication glitches in about 10% of cases.
  2. Inspect wire harness connections — Unplug the microwave and remove the outer cabinet panels using a screwdriver. Locate the wire harnesses connecting the control board (usually behind the control panel) to the inverter board (typically at the bottom). Check for loose connectors, burned wires, or corrosion. Disconnect and reconnect each harness firmly to ensure proper contact.
  3. Test the inverter board with a multimeter — With the microwave unplugged, use a multimeter to check for continuity on the inverter board connections and test voltage outputs when powered (exercise extreme caution as high voltage is present). Look for signs of physical damage like burned components, bulging capacitors, or scorch marks. If damage is visible or readings are abnormal, the inverter board needs replacement.
  4. Examine the main control board — Remove the control panel to access the main control board. Inspect for visible damage, burned traces, or failed components. Check all connector pins for corrosion or damage. If the inverter board tests fine but communication still fails, the main control board is likely at fault and requires replacement.
  5. Replace the faulty board — Order the correct replacement part using your microwave’s model number (found inside the door or on the back panel). Samsung inverter boards typically cost $80–$150, while control boards range from $100–$200. Follow manufacturer instructions for installation, ensuring all connections are secure and properly seated.
  6. Contact a professional technician — Given the high voltage components and technical expertise required, hiring a qualified appliance repair technician is recommended if you’re uncomfortable working with electronics. Professional repair typically costs $200–$400 including parts and labor, which is often more cost-effective than risking further damage.

FAQ

Can I continue using my Samsung microwave with the E-44 error code?
No, you cannot use the microwave when the E-44 error is displayed. The microwave’s safety systems prevent operation when there’s a communication failure between critical components. Attempting to bypass this error or force operation could result in damage to the unit or create safety hazards.

How much does it cost to repair a Samsung microwave E-44 error?
Professional repair costs typically range from $200 to $400, depending on which board needs replacement and your location. The inverter board costs $80–$150, while the main control board runs $100–$200. If your microwave is older than 7 years or the repair cost exceeds 50% of a new unit’s price, replacement may be more economical.

Is the E-44 error covered under Samsung warranty?
If your Samsung microwave is still within the manufacturer’s warranty period (typically 1 year for parts and labor), the E-44 error repair should be covered at no cost. Extended warranties or home protection plans may also cover this repair. Check your warranty documentation and contact Samsung customer service at 1-800-726-7864 to verify coverage before paying for repairs.