Does not climb walls / waterline
Where to look: Filters, impeller, cable slack, water chemistry.
Dolphin does not climb walls or move sideways on the waterline.
Picture
Quick answers
What is wrong?
Dolphin does not climb walls or move sideways on the waterline.
What you might notice
- Will not climb
- Slips on walls
Can I fix this myself?
Usually yes for cleaning/clearing. Difficulty: easy · about 10-20 min. If unsure or the fault returns, use mail-in repair.
What you need
- Soft cloth
- Garden hose
Do this
- Keep water ~6–35°C (ideally above 15°C). Balance chemicals; scrub algae/biofilm. Disable Floor Only / Fast mode if set by mistake.
- Clean filters (Ultra-Fine should rinse back toward white; else replace or try Net filters). Clear impeller debris.
- If handle is adjustable, set it diagonally. Ensure enough floating cable to reach walls without yanking back — not excessive length.
- If climbing still fails, request repair.
Parts (only if cleaning fails)
- Filter media
Official references
- https://www.maytronics.com/global/support/faq/?question=my-dolphin-does-not-climb-up-the-walls-or-move-sideways-on-the-waterline
- https://www.poolspa.co.th/wp-content/uploads/2025/07/PS-MANUAL-Robot-Pool-Cleaner-DOLPHIN-M700-English.pdf
- https://manuals.maytronics.com/intro/?pn=99996710-EU