Dolphin Fon Series Spare Parts

Dolphin Fon Series replacement-part compatibility is determined by the exact model and serial number on the technical sticker inside the robot’s chassis.

Dolphin Fon units share an internal mechanical design with direct-drive platforms, but differ in specific components:

• Filter baskets: options include 50-micron ultra-fine panels and 100-micron spring cartridges.
• Tracks and toothed belts: these vary depending on the width of the front and rear drive rollers.
• Contact brushes: options vary from PVC-blade versions for liners to rings or full foam rollers for glazed tile.

Checking the robot’s technical parts diagram before replacing the turbine impeller or power supply prevents mechanical errors and ensures a watertight fit.

Wall slippage can be fixed by replacing worn drive tracks and installing a Wonder foam brush made specifically for glazed tile.

With continued use, the inner toothed surface of the tracks loses its grip, causing play against the drive roller. Standard plastic-blade brushes also slip on ceramic surfaces with biofilm or limescale deposits. Replacing the drive belts and fitting highly porous foam rollers restores the hydrodynamic grip the robot needs to reach the waterline during the cleaning cycle.

The filter panels in the Dolphin Fon series should be replaced every two or three seasons of regular use to prevent a loss of suction flow.

Although synthetic fabrics can be pressure-washed after each session, the microfibers eventually become clogged with microalgae, limescale, and mineral particles that water cannot remove. When the filter basket becomes stiff, the hydrodynamic flow drops by 15% to 30%, straining the turbine motor and preventing the unit from climbing walls. Periodically inspecting the mesh for tears or deformation ensures that fine dirt is trapped and does not return to the pool.

In most cases, simply cleaning or replacing the turbine impeller is enough if it is cracked or blocked by leaves and threads.

To diagnose the fault without replacing unnecessary components, follow this technical procedure:

• Disconnect the power outlet and remove the top grille from the discharge channel.
• Turn the impeller by hand, checking that it moves without unusual resistance or rubbing against the nozzle.
• Remove any foreign objects that could become wrapped around the drive shaft.

If the impeller spins freely without mechanical obstructions but the robot continues to shut off after 60 seconds, the motor block’s thermal protection system or the power supply may require specialist technical assistance.

The main difference lies in the coefficient of mechanical friction each material provides, depending on the type of pool surface.

The flexible PVC blade brush is designed for use on liners, reinforced membrane, polyester or fiberglass, removing dirt buildup without damaging the pool’s plastic finish. By contrast, the Wonder foam brush is designed for gresite, glazed ceramic or very smooth painted pools, where PVC slips due to a lack of static grip. Installing the wrong material can cause the robot to veer off course or be unable to complete the vertical climb.

Replacing toothed tracks and filter panels on a Dolphin Fon 20 is a basic maintenance task that can be done at home without complex tools.

Exterior wear components are designed with click-fit anchors and quick-access sliders:

• The filter basket is removed through the top hatch using an integrated handle.
• The drive tracks are released by applying a slight sideways twist to the tension rollers.
• Roller bearings and brushes are removed by taking off the side retaining stops.

There is no need to open the motor’s sealed housing for these operations, which keeps the equipment’s original watertightness intact throughout the repair process in 2026.

Choosing original Dolphin Fon Series replacement parts guarantees exact mechanical tolerances and certified resistance to continuous exposure to chlorine and water salinity.

Non-original copies tend to have rigid plastics that crack under solar UV radiation and rubber parts that lose elasticity within a few weeks, causing deviations in the cleaning cycle. In addition, an uncertified impeller or a misaligned bearing shaft generates parasitic vibrations that damage the transmission and the motor block’s watertight seals. Using official spare parts ensures quiet operation, prevents costly breakdowns and verifiably extends the service life of the pool cleaner robot.