E9
Hitachi Temperature Calibration / Sensor Drift

Hitachi oven shows E9 and interior temperature does not match the set temperature

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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

Aged temperature sensor with drift, Mis-calibrated control board, Poor sensor mounting or loose screws

How to Fix / Troubleshooting

Safety first: Turn off power before accessing internal components.

  • Verify with thermometer: Use an oven-safe thermometer to compare actual cavity temperature with the set temperature over a 20–30 minute period.
  • Check sensor mounting: Ensure the sensor probe is firmly attached and not hanging loose inside the cavity.
  • Replace sensor: If readings are consistently off by a large margin, replace the oven temperature sensor.
  • Calibration (if available): Some Hitachi models allow temperature offset adjustment in the settings menu. Follow the user manual to fine-tune the temperature.
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Repair Difficulty

Medium 3/5

Required Part

Oven Temperature Sensor (NTC Probe)
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