Time: 20–30 minutes. Skill: homeowner-comfortable with a screwdriver and able to isolate the circuit at the breaker. Cost: the price of one replacement capacitor (NZD incl GST).
The Hayward Super Pump click-and-hum problem
The Hayward Super Pump is one of the most recognised pool pumps in the world, and a familiar sight on New Zealand pools. When one fails to start, the giveaway is usually a sharp click from the back of the motor followed by a steady hum — but no rotation. That hum is the motor straining without the starting torque the capacitor is supposed to supply. Owners sometimes mistake it for a seized bearing, but nine times out of ten on a humming Super Pump it’s the capacitor that’s given up, especially after a hot summer of constant filtering.
A new capacitor is a fraction of the cost of a new motor, and on the Super Pump it’s a tidy job for a careful DIYer.
Safety routine — do not skip
A capacitor can hold a dangerous charge even with the pump unplugged. Always work in this order.
- Isolate power at the breaker or pump isolator. Turning the pump off at its own switch is not enough.
- Discharge the capacitor by bridging its terminals with a bleed resistor (around 10–20 kΩ, 5 W) or a proper capacitor discharge tool — a bare insulated-handle screwdriver across the terminals also drains it but sparks violently and can pit the terminals, so use that only as a last resort before you touch the wiring. This drains the stored charge.
- New Zealand law requires a licensed electrician for fixed mains wiring. If your Super Pump is wired directly into the board, or you’re not confident, bring in a sparky.
Where the capacitor sits on a Super Pump
On the classic Super Pump the capacitor is mounted under a metal or plastic cover on top of the motor toward the rear, near the back end-bell. You’ll usually remove a single screw or two to lift the cover and find the cylindrical capacitor clamped underneath with spade connectors. Some models tuck it under the rear canopy, so clear access to the back of the motor first.
What you’ll need
- The replacement run capacitor — match the µF (within ±5%) and equal-or-higher voltage to the one fitted now.
- Phillips and flat screwdrivers.
- An insulated screwdriver, or a 10–20 kΩ bleed resistor with insulated leads, to discharge the old capacitor safely.
- A multimeter, if you want to confirm the diagnosis before swapping.
- Your phone — to photograph the wiring before disconnecting anything.