Dolphin Sigma
All fixes →Model-specific fixes for the Sigma, starting with raised main drains and the optional center brush.
Problems covered
The Pool Nerd Support Lab
Fix the problem. Get back in the pool.
Product-specific troubleshooting based on the equipment we own, use, and test. Pick your product to find the likely cause, the safest first check, and the fix that worked for us.
Try “Dolphin Sigma,” “main drain,” or “tracks.”
1 Product PageOrganized by product type
1 Tested FixClear, model-specific steps
Hands-on AdviceFrom equipment in our test pool
Choose your product
Each product has one home for every issue we diagnose. We will keep adding fixes as new problems surface during long-term testing.
No matching troubleshooting page yet
Try a product name or a shorter symptom, or use the general guide below.
How these guides work
We start with the repeatable checks that separate a small setup problem from a part that actually needs service.
Match the exact symptom
Use the quick diagnosis to confirm that your product is failing the same way ours did.
Try the safest fix first
Every page starts with low-risk checks before asking you to open, adjust, or replace anything.
Know when to stop
Clear service signs tell you when the problem is no longer a do-it-yourself adjustment.
Don’t see your product yet?
Our product pages are growing with our test lineup. For now, start with the general guide to robotic pool cleaners getting stuck on raised main drains.