What to do if my Madimack ECO Heat Pump shows error E3?
- AAmy MccormickAug 25, 2025
If your Madimack Heat Pump displays error code E3, it indicates a low water flowrate. Check the water flow in the pipes and ensure the filtration pump is running. Inspect the filters, skimmer basket, and backwash. Also, verify that the bypass or valves haven't been adjusted since the unit was commissioned, and check the water flow switch.




