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Dishwasher

Dishwasher not heating water? 2 likely causes

A failed heating element, thermostat or NTC sensor.

Symptom: Dishes come out cold with residue · Typical cost: £80–£170.

Always switch off and unplug the appliance before inspecting it. Never work on gas appliances or fixed electrical wiring yourself — call a Gas Safe registered engineer or a qualified electrician.

Likely causes, most common first

  1. 1

    Failed element

    DIY: moderate

    Limescale and age burn out the heater.

    The fix:Replace the element.

  2. 2

    Faulty thermostat / sensor

    DIY: moderate

    The machine cannot detect or maintain heat.

    The fix:Replace.

When to call an engineer

  • You are not comfortable working on the appliance, or the fix involves electrics or gas.

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Error codes linked to this fault

Dishwasher how-to guides

Other dishwasher faults

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Frequently asked questions

How much does it cost to fix a dishwasher problem like this?

£80–£170.

Is it safe to keep using it?

If you can see leaks, smell burning, or the appliance is tripping the electrics, stop using it and unplug it. For minor faults without those signs it is usually safe to leave it off until you can diagnose it. Always switch off and unplug the appliance before inspecting it. Never work on gas appliances or fixed electrical wiring yourself — call a Gas Safe registered engineer or a qualified electrician.