Pump stops with E10, water flow is very low or zero

Safety first: Turn off power before opening the pump lid or working on pipework.

• Check strainer basket: Remove the transparent lid on the Lowara pump and clean the basket thoroughly. Ensure the basket seats correctly.
• Verify valves: Confirm all suction and return valves are fully open and that any bypass valves are correctly positioned.
• Inspect for air leaks: Check the pump lid O‑ring for cracks or flattening. Lubricate with silicone grease and reseat. Tighten unions on the suction side.
• Re‑prime the pump: Fill the strainer housing with water, replace the lid, open any air bleed, and start the pump. It should establish a solid flow within a minute.
• Sensor check: If flow is clearly present but E10 still appears, the flow or pressure sensor used by the Lowara control may be faulty or miswired.
• When to call a pro: Persistent dry‑run alarms with good hydraulics require sensor or control diagnostics by a technician.