Safety: Unplug the refrigerator before accessing the rear control compartment.

1. Power cycle: Disconnect power for 10–15 minutes, then reconnect. If E7 clears and does not return, monitor operation. If it returns quickly, proceed.
2. Inspect the main PCB: Remove the rear lower cover to access the control board. Look for burnt components, bulging capacitors, or signs of moisture damage.
3. Check all connectors: Ensure all harnesses are fully seated and not burnt or loose. Reseat each connector one at a time.
4. Verify supply voltage: If you have a meter and are qualified, confirm correct mains voltage at the input terminals (with extreme caution). Low or unstable voltage can trigger control errors.
5. Replace the main PCB: If visible damage is present or E7 persists after checks, the main control board is likely defective and should be replaced with the correct Hisense part number.

Recommendation: Due to shock risk and the need for correct board programming, main PCB replacement is best handled by a professional technician.

Display shows E7 and the refrigerator may not cool properly or may shut down unexpectedly.

Possible Causes