HI
Hoover
Temperature Sensor Open Circuit / Out-of-Range High Reading
Display shows HI or a very high temperature reading that does not match the actual cool interior.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Broken or disconnected NTC sensor, Sensor plug loose from PCB, Cut sensor cable inside cabinet wall, Faulty sensor input on main PCB
How to Fix / Troubleshooting
Safety first: Unplug the wine cooler before removing any panels or testing wiring.
Steps to resolve HI:
- Locate the affected sensor: Determine which zone or compartment is showing HI and access that cabinet sensor.
- Check connection: Ensure the sensor connector is firmly plugged into the main PCB. Reseat it if necessary.
- Inspect cable: Look for visible cuts, pinches, or rodent damage along the sensor wire path.
- Test resistance: Disconnect the sensor and measure resistance at room temperature. An open circuit (OL) indicates a broken sensor.
- Replace sensor: If open or intermittent, install a Hoover-compatible NTC sensor. Follow the original routing and secure it properly.
- PCB check: If a new sensor still reads HI, the main PCB sensor input may be faulty and require board replacement.
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Repair Difficulty
Medium
3/5
Required Part
Cabinet NTC Temperature Sensor
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