Display shows H1 and the temperature reading is extremely high or flashing, even though the interior feels cool.

Safety first: Disconnect power before accessing sensors or the control board.

Steps to diagnose and fix:

• Identify affected zone: Determine whether H1 refers to the upper or lower compartment based on your model's manual or which temperature display is flashing.
• Inspect sensor wiring: Locate the corresponding NTC sensor and follow its wire. Look for spots where the insulation is rubbed through or pinched against metal, which can cause a short.
• Dry moisture: If condensation is present around the sensor or connector, dry thoroughly and ensure the sensor is not submerged in water or ice.
• Measure resistance: Disconnect the sensor and measure resistance at room temperature. A very low resistance (near 0 Ω) indicates a shorted sensor that must be replaced.
• Replace sensor: Install a new BODEGA NTC sensor for the affected zone, routing the wire to avoid sharp edges and moisture-prone areas.

When to call a professional: If a new sensor does not clear H1, the main control board may have a damaged sensor input circuit and should be replaced by a technician.