Jandy AquaLink RS / iAquaLink WiFi-Enabled Pool & Spa Automation Controller with Mobile App Control NO FLOW Error Fix: No Water Flow Detected

Error code NO FLOW on the Jandy AquaLink RS / iAquaLink WiFi-Enabled Pool & Spa Automation Controller with Mobile App Control means: No Water Flow Detected. The flow switch or flow sensor reports no water flow through the system — the controller will not activate the heater or salt chlorinator without confirmed flow to prevent damage; check that the pump is running and at adequate speed; check the filter for excessive pressure (dirty filter restricting flow); verify all valves are open; the flow switch itself may be stuck or defective — test by checking switching action while pump runs; a flow switch stuck in the open position will show NO FLOW even with good water flow

The most successful fix is "Test and Replace the Flow Switch" (medium difficulty, ~45 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Test and Replace the Flow Switch") is rated medium difficulty and takes about 45 minutes. Tools needed: Flathead screwdriver, Multimeter, Adjustable wrench.

DIY cost: $10-$20. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

The Jandy AquaLink RS / iAquaLink WiFi-Enabled Pool & Spa Automation Controller with Mobile App Control has 8 other known error codes, including: CHECK SYSTEM (General System Fault), COMM ERR (Communication Error — RS-485 Bus Failure), FREEZE PROT (Freeze Protection Mode Active), HEATER COOL (Heater Cooldown Cycle Active), HIGH CURRENT (High Current Draw on Monitored Circuit), and 3 more.