Diagnostic Matrix
| Symptom | Probable Cause | Check | Action |
|---|---|---|---|
| Hole is tiny or freezing over | Shallow-water destratification | Measure water depth | Relocate to deeper water; adjust mount angle |
| GFCI trips immediately | Extension cord moisture, damaged jacket | Check for extension cord | Remove extension cord; test on dedicated outlet |
| Motor hums but will not spin | Vegetation wrap; failed capacitor | Unplug first, then manually spin prop | Clear debris; replace prop or capacitor |
| Unit shuts off after 10-15 minutes | Thermal overload trip | Inspect frame for sediment loading | Clean motor frame and prop; verify supply voltage |
Sacrificial Anode Maintenance
Kasco and U.S. Solar Mounts de-icers use a sacrificial zinc anode on the motor shaft to reduce galvanic corrosion in brackish or salt water. Inspect the anode roughly every 90 days and replace it once it is significantly eroded to help protect the motor housing and seals.