Troubleshooting · Movement & Cycles
Why won't my Dolphin finish a cycle, or why is the power supply light red?
Short answer: If your Dolphin stops early or the power supply shows a red light, first check whether the power supply shuts off when the robot stops.
If the power supply stays on when your Dolphin stops, unplug it, remove the robot from the pool, and inspect the tracks and brushes for debris or damage.
Based on Maytronics support, updated 2026-04-26, rewritten by Poolbots' pool experts. Parts that fix it are below.
The fix
Step by step.
The self-service tool provides troubleshooting and lets you submit a warranty claim for a repair or power supply replacement.
For repair help, including a robot purchased through a local dealer, chat with Poolbots' pool experts. For warranty repairs, Poolbots will point you to Maytronics' service process.
If your Dolphin stops shortly after starting or ends its cleaning cycle early, follow the checks below. A red light on the power supply indicates an error with the robot.
Before turning on your Dolphin: Make sure it is submerged in at least three feet of water.
Check whether the power supply also shuts off. If it turns off as soon as the robot stops, the problem may be with the power supply. Follow the power supply troubleshooting steps.
If the power supply stays on but your Dolphin stops cleaning early, follow these steps:
-
Step 1Disconnect the power supply
Unplug the power supply from the electrical outlet. Then take your Dolphin out of the pool.
-
Step 2Inspect the drive system
Turn the robot upside down and rotate the brushes by hand. A small amount of resistance is normal.
Look over the tracks, brushes, and tight spaces around them for anything blocking movement or showing visible damage.
Follow the track-cleaning instructions if you find debris in the tracks.
-
Step 3Inspect the impeller and nearby parts
Safety warning: Keep the power supply unplugged.
If debris is caught in the impeller, open the impeller area, clear out the debris, and reassemble it. Use a Phillips-head screwdriver, not a power drill.
Follow the impeller-cleaning instructions for this check.
-
Step 4Check PowerStream, on selected models only
If your Dolphin has a Power Stream mobility system, it is located on top of the impeller. Inspect the plastic cover around the motor unit and the grilles on the sides of the robot. Clear away any visible debris.
For help with these checks, contact Poolbots' pool experts by live chat or phone.
Source: Maytronics support. Same steps and facts, rewritten for clarity; the videos and illustrations are Maytronics' own.
Replacement parts
Parts that fix this.
This answer comes down to power supplies & chargers. The exact part depends on the model: choose your robot and we open its parts list, or browse the category for every model.
Browse by category:Power Supplies & Chargers All genuine Dolphin parts →
Still need help?
