Olimpia Splendid Short Cycling / Control or Sensor Issue

Dehumidifier frequently turns on and off in short cycles.

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Possible Causes

Humidity setpoint too close to room humidity, Faulty humidity sensor causing erratic readings, Oversized unit for small room, Main PCB hysteresis settings abnormal

How to Fix / Troubleshooting

Steps:

  • Adjust setpoint: Set the desired humidity at least 5–10% below the current room humidity to reduce rapid cycling.
  • Relocate unit: Avoid placing the dehumidifier directly under a supply vent or near a localized moisture source that can cause rapid sensor swings.
  • Sensor check: If cycling is extreme (every 1–2 minutes), inspect and possibly replace the humidity sensor assembly.
  • PCB issue: If a new sensor does not help, the main PCB control logic may be faulty and require replacement.
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Repair Difficulty

Easy 2/5

Required Part

Humidity Sensor Assembly
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