Maytronics Dolphin Repair And Troubleshooting

Maytronics Dolphin repair is very limited. Limited to the outside of your Dolphin Automatic Pool Cleaner.


Help for your Dolphin has arrived! Aquaquality Pools and Spas Inc, is now a dealer and service provider for Dolphin Pool Cleaners and Tiger Shark Pool Cleaners. 1-866-876-8643



Ask MaytronicsUS a question (new window)

Maytronics Dolphin Troubleshooting

Dolphin Diagnostic Transformer Repair

Dolphin Diagnostic Parts: Cable Testing and Replacement

Maytronics Dolphin Diagnostic User's Manual (opens new window)


Forget about replacing the pump and motor. Unless you have a spare robot for parts, internal maytronics parts are impossible to get. Your dealer will send your robot out for repair.

I have several photos including a photo of the inside of the motor housing.



Maytronics Dolphin Drive Track Removal

1. Remove the bottom plate with bag.

2. With the machine upside down, remove the screws holding the debris shield and remove the shield.

Dolphin Bottom Plate Removed


Maytronics Dolphin Debris Shield Removal


3. Remove the screws holding the side plate.

4. Gently pry off the sideplate. It may need much persuasion due to dirt buildup on the sideplate pegs that slide into the body.

Maytronics Dolphin Sideplate Removal


Maytronics Dolphon Sideplate Removed


Be sure to clean dirt, debris and other contaminants from the parts that slide into each other.

5. Remove the drive track. The system is direct drive with the drive gear in the center. Drive gear and pulleys slide off the spindles.


FOR THE CURIOUS I opened a motor compartment to satisfy the question of what is in it. No instructions are included to put it back together because parts are unavailable.

The motor assembly inside the robot body is held in place by screws accessible once the sideplates are removed. Inside the box is the pump, drive motor, circuit board and a counterweight to offset the buoyancy of the air filled box.

Opening this box creates the challenge of airtight reassembly. The gasket must be re-used and I suggest a good coating of silicone to keep it pliable and easier to slide into position.

Notice the motors have little direct cooling contact with the water.




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What Other Visitors Have Said

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dolphin has a hard time going to the bottom Not rated yet
My dolphin is having a hard time submerging, when i finally hold it under and i guess its fills up with water, it is fine. and does it have BBs or ball …

Dolphin Pool Cleaner circuit board Not rated yet
my dolphin stops after about 30 secs. Like you, curiosity got the best of me. I opened it up and tested all the motors. They seem to work fine. So I think …

Dolphin diagnostic turns on and circulates water but will not move Not rated yet
the dolphin diagnostic turn on and circulates water but will not move at all once it goes to the bottom of the pool. I've had it for about six years now. …

commander aquabot will not move Not rated yet
once in pool nothing happens, I hear a sound from the power supply. I was told there it may need a fuse or there should be a reset button on the power …

dolphin 4 stopped working. Not rated yet
i need a dophin 4 motor. P L E A S E H E L P!!!!!! IT JUST STOPPED WORKING TODAY. IF WE HAD THE RECEIPT, WE COULD GET THE MOTOR REPLACED FOR FREE. …

Powerless Dolphin Pool Cleaner! Not rated yet
Hello, my Dolphin has worked great for some time, but one day the power source started turning off, I push the button, it makes a little bit of noise and …

Twisted Dolphin Electric Power Cable Not rated yet
The 40' cord on my dolphin is twisted. How can I get it back to it's original straightness? ADMIN REPLY: 2 things to do. Lay it out straight in the heat …

dolphin will run for about 5-10 secs then stops Not rated yet
My dolphin only runs about 10 seconds then shuts off. When it starts to shut down a green light on the circuit board begins to flash. If I turn off the …

Dolphin Trouble, Moves One Foot Not rated yet
This morning I turned on my dolphin and noticed it didnt seem to move much. I switched the power off and after a few seconds turned it back on. The Dolphin …

troubleshooting Not rated yet
On the left side of my electrical unit that is attached to wheels, the black screw-like thingy came lose and the greeen and white wires are exposed. is …

Dolpin Deluxe 5 Full Bag Indicator Not rated yet
I am trying to find out what the red light means on my Dolpin Deluxe 5 w/remote that comes on when I put the dolpin in the water. The red light is above …

Dolphin Diagnostic is Powerless Not rated yet
My dolphin diagnostic will not move-the power supply is on but the dolphin doesn't go when in the water-What should I check first? REPLY: Check for obstructions …

Dolphin Start and Stop Not rated yet
While using the dolphin robot for the first time of the season it goes forward then backwards a few times then goes forward for a longer while (30 seconds) …

First start of season. Dolphin Won't Start Not rated yet
I put the unit in my pool and when I pressed the "ON" button, the button "lit" and there was a little buzz and the light on the button clicked off. I checked …

Belt keeps slipping off the trackr Not rated yet
When the machine is put in the water after about 15 minutes the track comes off the wheels. What can I do to fix this problem. ADMIN REPLY First …

PANNE CLASSIQUE DU DOLPHIN Not rated yet
Bonjour J'ai 2 blocs moteur qui ont le même problème. A l'allumage, le moteur d'entrainement marche dans un sens puis s'arrete, redémarre dans l'autre …

Dolphin advantage diagnostic Not rated yet
My dolphin vacuum it doesn't move in the water . Outside is moving please can you help me to fix the problem . I live in Cyprus and I bought the vacuum …

Reset button on power supply Not rated yet
I just bought a new Dolphin and no where in the user manual does it tell you what the reset button is for. Mine started flashing and then the unit shut …

water in Dolphin motor box? Not rated yet
I started my dolphin after cleaning it. While it was pumping water through it flipped on it's back on the bench in the shallow end and stopped working. …

Dolphin Pool Cleaner Motor Broken. Not rated yet
It appears my motor is bad in my Dolphin pool cleaner. Is there anyone in the Sacramento, ca. area that repairs them? ADMIN REPLY: Unfortunately, there …

Great info!! Need new blue power cord for my dolphin diagnostic Not rated yet
Where can I get a new blue power cord for my dolphin diagnostic? Is there a part number because normal searches are turning up nothing... ADMIN REPLY: …

Dolphin Magic motor testing Not rated yet
Magic Dolphin had broken one brush cylinder.Power pack failed( as consequence? ) Repaired with new thermal protector switch and rectifier.Tested motor …

My dolphin goes 1 ft one way and then one ft the other, then stops! Help???? Not rated yet
My dolphin goes 1 ft one way and then one ft the other, then stops! Help????

How do you repair the plug portion that goes into the power supply? Not rated yet
The unit shorted out and i just need to reconnect the wires. Is it and allen key? I have never seen this type of connection before. Please be specific …

Dolphins tarts but gets stuck in one place Not rated yet
My Dolphin advantage starts OK and moves along for a few minutes but it eventually gets to a sidewall and tries to climb it. The top propeller stops so …

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Maytronics circuit board repair Not rated yet
First, on mine, I do not have to remove the side panels to remove the motor assembly. The screws are accessible from the handle opening. My question …

Dolphin Pool Cleaner motor Not rated yet
Greetigs All, my dolphin was free and worked great for two years now the drive motor is shot and can't find anyone to repair it.I miss the hard work …

self test why do these things fail on such a grand scal Not rated yet
if the cleaner runs through the self-test cycle as prescribed by some sites, what makes it realize that it shouldn't procede with the pool cleaning? …

Dolphin Pool Cleaner Misses Corners Not rated yet
Doesn't seem to get to the corners in our pool. ADMIN REPLY: This is a problem common to many robots. Simply brush debris out of the corners.

PISSED OFF Dolphin pool cleaner owner Not rated yet
Can't find a new cord. I guess thats how you sell more expensive pool cleaners. I think it wold be cheaper to hire a pool guy. Oh buy the way it's a DOLPHIN. …

Dolphin Electronic Card Fuse Not rated yet
Goodmorning we have a problem with our dolphin diagnostic 6h unit. we have a electronic card is fuse (drive motor). We ask how repair this or where …

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