Pumps, filters and equipment
A pool pump that will not start
A silent pump and a humming pump that will not turn are two different faults. Which one you have narrows the cause quickly.
If the pump is completely silent, the cause is usually upstream: a timer or controller that has lost its programme after a power cut, a tripped breaker or residual current device, an isolator switched off, or a fault in the controller. Checking those, safely and without opening electrical enclosures, often finds the problem.
Equipment guides cover servicing and faults on the plant an existing pool already has.
If the motor hums but does not turn, the motor is receiving power but cannot start. Common causes are a failed start capacitor on single-phase motors, a seized impeller from debris or scale, or bearings that have locked. These need a technician, and the pump should be switched off rather than left humming.
The short version
Silent pump
Points to power, timer, controller or protective devices.
Humming pump
Points to the motor — capacitor, seized impeller or locked bearings.
Switch off a humming pump
Leaving it humming can overheat the motor.
What a technician checks
Controls and timers
Programme, clock, relay outputs and any automation that may be holding the pump off.
Electrical protection
Why a breaker or RCD tripped — moisture, a failing motor or a wiring fault.
Motor and wet end
Capacitor, bearings and whether the impeller turns freely.
Safe checks before calling
Check the timer and controller
Look for a blank display or a reset clock after a power cut.
Look at the breaker
If it has tripped once, reset it once. If it trips again, leave it off.
Listen at the motor
Silent or humming tells a technician a great deal.
Common questions
Can a power cut stop the pump permanently?
Many timers lose their programme after a power cut, leaving the pump off until reset.
Why does the breaker trip when the pump starts?
Moisture in the motor or wiring, or a failing motor, are common reasons. It needs inspecting.
How long can the pool go without the pump?
In summer, water deteriorates quickly. Chlorine and clarity can suffer within a few days.
Related pool care guides
- Air bubbles coming out of the pool jetsA related check on the same part of the plant.
- Restoring weak flow from pool return jetsA related check on the same part of the plant.
- Repairing or replacing a pool pumpA related choice about how the pool is looked after.
- When pool pH is too highAnother water problem with a related cause.
This guide sits under pool equipment repair. Browse all pool care guides. We look after pools at homes and commercial properties across Dubai.
Ask about your pool
Tell us where the pool is and what you are seeing. A photograph of the pool and the plant room helps us plan the visit.
Phone
+971 56 181 0106Talk through what the pool is doing and book a time for us to see it.
WhatsApp
Send a messageThe easiest way to send photographs of the pool and plant room.
Next step
Pump not starting?
Tell us whether it is silent or humming and send a photo of the controller. We will arrange a visit.