Washer-dryer combo displays HC or HC error, and water temperature seems incorrect.

Safety first: Turn off the water supply before disconnecting hoses.

• Verify connections: Check that the hot hose from the hot faucet is connected to the hot inlet on the washer (usually marked red or 'H') and the cold hose to the cold inlet (blue or 'C').
• Swap hoses: If reversed, swap the hoses at the back of the unit.
• Run test cycle: Run a warm cycle and confirm the correct temperature.