Dolphin Sigma Robotic Pool Cleaner with Gyroscope Navigation and Triple Motor System for In-Ground Pools up to 60 ft PSU-OVERHEAT Error Fix: Power Supply Overheating

Error code PSU-OVERHEAT on the Dolphin Sigma Robotic Pool Cleaner with Gyroscope Navigation and Triple Motor System for In-Ground Pools up to 60 ft means: Power Supply Overheating. The power supply unit shuts down during operation due to overheating — move the PSU to a shaded location out of direct sunlight, ensure adequate ventilation around the unit, and keep it off hot surfaces like concrete pool decks in summer

The most successful fix is "Replace or Repair PSU Cooling Components" (medium difficulty, ~45 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Replace or Repair PSU Cooling Components") is rated medium difficulty and takes about 45 minutes. Tools needed: T10 Torx screwdriver, Compressed air can, Multimeter.

DIY cost: $10-$20. Professional repair typically costs $150-$220. Many homeowners save money by trying the top-ranked community fix first.

The Dolphin Sigma Robotic Pool Cleaner with Gyroscope Navigation and Triple Motor System for In-Ground Pools up to 60 ft has 8 other known error codes, including: APP-CONNECT (App Connection Failure), BRUSH-STOP (Brushes Not Spinning), BRUSH-WORN (Worn Scrubbing Brushes), CABLE-CORROSION (Cable Connector Corrosion), CABLE-DAMAGE (Cable Deterioration), and 3 more.

Error code PSU-OVERHEAT also appears on 8 other Dolphin models: E10 Automatic Robotic Pool Vacuum Cleaner with Active Scrubber Brush and Top Load Filters for Above-Ground Pools up to 30 ft, EON 120d Robotic Pool Cleaner with DebrisLock Backwash Filter and SmartMap Navigation for In-Ground Pools up to 50 ft, Liberty Cordless Battery-Powered Robotic Pool Cleaner with Multi-Layer Filtration for In-Ground Pools up to 40 ft, Nautilus CC Plus Wi-Fi Robotic Pool Vacuum Cleaner with Wall Climbing and Scrubber Brush for In-Ground Pools up to 40 ft, Nautilus CC Robotic Pool Vacuum Cleaner with Scrubber Brush for In-Ground Pools up to 33 ft, Premier Robotic Pool Cleaner with Smart Navigation and Multi-Media Filtration for In-Ground Pools up to 50 ft, and 2 more. The fix may vary by model, so check each model's specific page for tailored repair steps.