Smeg Dishwasher Error E8

⚡ Quick Answer: The SMEG dishwasher E8 error indicates a malfunction in the drainage system, specifically related to the alternate or diverter valve. This can cause w... ✅ DIY Fixable

What Does Error E8 Mean?

The SMEG dishwasher E8 error indicates a malfunction in the drainage system, specifically related to the alternate or diverter valve. This can cause water to pool at the bottom and lead to poor wash performance due to insufficient water distribution to the spray arms. Common symptoms include the immediate halt of the dishwasher program and unusual sounds during operation.

Common Symptoms:

  • Dishwasher program stops immediately when E8 appears
  • Insufficient water distribution to spray arms
  • Weak spray or poor wash performance

Possible Causes

  • Defective alternate/diverter valve (high)
  • Blocked or scaled water distribution assembly (water matrix/heat exchanger) affecting alternate wash system (medium)

How to Fix Error E8

DIY Fix Basic checks and reset

  1. Turn off the dishwasher and disconnect power for several minutes
  2. Ensure water supply is on and inlet hose is not kinked
  3. Restart the dishwasher and run a new wash cycle to see if code clears
  4. Check spray arms and filters inside dishwasher for debris and clean if needed

Technician Only Inspect and repair alternate/diverter valve and water distribution components

  1. Disconnect dishwasher from power and water supply
  2. Remove necessary panels to access the alternate/diverter valve and water distribution assembly
  3. Test or inspect alternate valve for correct operation and replace if faulty
  4. Inspect water matrix/heat exchanger for blockages or limescale; clean or replace assembly as needed
  5. Reassemble and test dishwasher
  6. Verify proper water distribution to spray arms

Parts needed: Alternate/diverter valve, Water distribution assembly (water matrix/heat exchanger), Gaskets/seals if disturbed

🛑 When to Call a Pro:
  • If the error persists after basic user checks
  • If internal components like valves or water distribution assemblies need inspection

Next step

Choose the next step for E8

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Check during diagnosis

Most relevant component to inspect

Drain Pump

Pumps waste water out of the appliance during the drain cycle.

Typical part-only price
$35 - $80
DIY difficulty
Easy
Estimated time
15-30 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Also check
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Other components that may be involved

Check these only if your diagnosis points to them.

Possible related component

Drain Hose

Carries waste water from the drain pump to your home's standpipe or sink drain.

$15 - $30 · Easy · 15-30 mins

Check fit & price

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Technical Specifications

wattage 30W
component Drain Pump
resistance 5-15 ohms
part_number Smeg 007900001
voltage_rating 230V AC

Common Questions

What does E8 error mean on SMEG dishwasher?

E8 error indicates a drainage system malfunction, often due to a defective alternate/diverter valve.

Can I fix SMEG dishwasher E8 error myself?

Yes, start with basic checks like resetting the dishwasher and ensuring the water supply is on.

How much does it cost to fix E8 error?

The estimated repair cost ranges from $100 to $300+, depending on parts and labor.

When should I call a technician for E8?

Call a technician if the error persists after basic checks or if internal components require inspection.

Sources & References

Data last verified: 2026-07-25

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