H1
Hisense High Ambient Temperature Protection

Dehumidifier displays H1 and stops; may indicate high temperature condition.

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Possible Causes

Room temperature above design limit, Blocked air intake or exhaust, Dirty condenser coil, Failed ambient temperature sensor misreading high temperature

How to Fix / Troubleshooting

Safety first: Unplug the unit if any burning smell is present.

  • Check room temperature: Ensure the room is below the maximum rated temperature (typically 95°F / 35°C). Move the unit to a cooler area if necessary.
  • Improve ventilation: Provide at least 12 inches of clearance around all sides. Do not operate in a confined closet or near heat sources.
  • Clean filter and coils: Wash the air filter and vacuum the condenser coil to improve heat dissipation.
  • Sensor check: If H1 appears in a cool room, inspect and test the ambient temperature sensor and replace if faulty.
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Repair Difficulty

Easy 2/5

Required Part

Ambient Temperature Sensor (NTC)
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