Pump starts then stops with E06, sometimes accompanied by humming noise

Safety first: Disconnect power and discharge capacitors before handling. Capacitors can retain charge.

• Access capacitor compartment: On many Calpeda single-phase pool pumps, the capacitor is housed in a cylindrical or box-shaped enclosure on top or side of the motor. Remove the cover carefully.
• Visual inspection: Look for bulging, leaking, or cracked capacitors. Any visible damage means the capacitor must be replaced.
• Test capacitance: Using a multimeter with capacitance function, measure the capacitor value and compare it to the µF rating on the capacitor label. Replace if more than ±10% out of spec.
• Check connections: Ensure all spade terminals are tight and free of corrosion. Clean and crimp as needed.
• Replace with correct part: Install a Calpeda-specified start/run capacitor with the same capacitance and equal or higher voltage rating. Secure it properly to avoid vibration damage.
• Reassemble and test: Refit covers, restore power, and start the pump. If E06 or humming persists, the motor windings may be damaged and require replacement.