Hitachi Temperature Control Inaccuracy

Unit runs but room becomes too cold or too hot compared to set temperature

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Possible Causes

Room sensor not sensing true room temperature, Sensor covered by dust, Indoor unit installed in corner or near heat/cold sources, Faulty thermistor calibration

How to Fix / Troubleshooting

Safety first: Turn OFF power before accessing sensors.

Steps:

  • Clean sensor area: Remove dust from around the room sensor and air intake.
  • Check installation: If the unit is installed near a window with direct sun or near a heat source, consider shading or relocating heat sources.
  • Use fan settings: Use a medium fan speed to improve room air mixing.

If temperature remains inaccurate: The room thermistor may need replacement or the PCB may require calibration by a technician.

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Repair Difficulty

Easy 2/5

Required Part

Indoor Room Temperature Thermistor
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