1. Check for proper line voltage and phase, also proper motor wiring. 2. Binding motor shaft or pump parts. 3. Inadequate ventilation. 4. Fluid being pumped should not exceed 194°F (90°C) for extended periods of time.
1. Check for proper electrical connections to the motor and proper cord size and length. 2. Check for foreign material inside the pump. 3. Remove the bracket and check for impeller rotation without excessive resistance. 4. Remove pump and check shaft rotation for excessive bearing noise. 5. Have authorized serviceman check start switch and/or condenser.