How to service the circulation pump in your dishwasher

Escrito Por: Ula Gantar
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How to service the circulation pump in your dishwasher

Dificuldade

Moderate

Passos

18

Tempo necessário

25 - 35 minutes

Introdução

Follow this guide to revive a dishwasher that only hums, struggles to start, or has been idle for a long time. You will remove the circulation pump, clean and grease its shaft seal, and replace the inexpensive 6 µF motor-start capacitor that often fails. A correctly serviced pump restores water pressure and extends the life of your machine.

    • Unplug the dishwasher from the electrical supply before starting any work.

    • Lay the dishwasher on its back to keep any remaining water from running out.

    • Tilt the machine onto its side to reach the circulation pump spacers on the rear.

    • Detach the earth wire from the pump.

    • Support the cabinet with padding to avoid strain on components.

    • Disconnect the pump wiring harness, noting how the capacitor is wired.

    • Look for the simple mounting clips and release them before pulling the pump housing free.

    • Avoid forcing parts off to prevent damage to plastic fittings.

    • Locate the 6 µF motor start capacitor fixed to the pump body.

    • Spin the motor shaft by hand; heavy resistance indicates a dry or seized seal.

    • Decide to install a new capacitor because it costs only a few euros.

    • Undo the pump screws to open the housing and inspect the seal.

    • Remove the housing screws and separate the impeller and motor from the volute.

    • Verify the motor now turns freely once the impeller is off.

    • Inspect the shaft seal; if it is merely "asleep", reuse it with fresh grease.

    • Do not spray universal blue lubricants or oils on rubber parts because they attack the material.

    • Clean the plastic shaft and surrounding surfaces thoroughly without abrasive scraping.

    • Coat the seal, shaft and bearing surfaces with a heavy industrial grease rated for heat, steam and water.

    • Never lubricate these areas with oil.

    • Reinstall the impeller and mate the two pump halves.

    • Tighten the housing screws in a criss-cross pattern so the gasket compresses evenly.

    • Remove the old capacitor with a 13 mm wrench.

    • Fit the new 6 µF capacitor and secure its plastic nut gently.

    • Photograph the wiring beforehand and reconnect the leads exactly as they were.

    • Push the rubber spray-arm feed and other hoses fully home and clamp them firmly because the pump runs at high pressure.

    • Reconnect the earth wire and motor leads following your photo or the colour coding.

    • Insert the two supply wires into the capacitor terminals to complete the circuit.

    • Snap the plastic cover over the capacitor.

    • Bolt the pump assembly back onto the dishwasher base.

    • Give every coupling and wire a final check before setting the machine upright.

    • A new capacitor costs less than ten euros, making this repair very economical.

Conclusão

Your dishwasher’s circulation pump should now spin freely and deliver full pressure again. Reconnect the water hose, stand the appliance upright, and run a test cycle to confirm there are no leaks. Regular use and occasional lubrication will keep the pump from seizing in the future.

Autor(a)

Ula Gantar

Membro desde: 08/01/25

16609 Reputação

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