Asko Dishwasher: water hammer

Possible Causes

Rapid valve closure causing pressure shock in supply line (water hammer)

How to Identify: Banging or knocking sound in piping coincides with dishwasher fill or rapid valve closure; noise originates from pipes, not internal dishwasher mechanisms

Part: Water supply line and solenoid inlet valve

DIY Solutions

Install or add water hammer arrestor on dishwasher supply line

Moderate 30-60 minutes

Tools Needed: adjustable wrench, pipe thread seal tape, water hammer arrestor

1. Shut off water supply to dishwasher.
2. Disconnect dishwasher water supply line at the shutoff valve.
3. Install a water hammer arrestor between the shutoff valve and supply line using thread seal tape.
4. Reconnect the supply line and restore water supply.
5. Run dishwasher and check if banging is reduced.

⚠️ Safety First: Turn off water supply before working on plumbing.

Slightly reduce water pressure at shutoff valve

Easy 5-10 minutes

Tools Needed: none or screwdriver for some valves

1. Locate the shutoff valve under the sink feeding the dishwasher.
2. Partially close the valve to reduce water pressure slightly.
3. Test dishwasher to see if banging noise is reduced.

⚠️ Safety First: Do not over-restrict water to avoid dishwasher fill issues.

Next step

Choose the next step for water hammer

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

Model number required

Browse by model — no specific failed part is claimed

Model-compatible Dishwasher parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

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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.

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Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Dishwasher Cleaner and Descaler

Supports routine removal of mineral scale, grease, and odor. It is maintenance, not a repair for a failed pump, valve, or control.

View maintenance supply

Maintenance supply

Braided Dishwasher Inlet Hose

For replacement of an externally damaged supply hose. Verify connection size, length, and appliance installation requirements before ordering.

View maintenance supply

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

Professional Repairs

Reconfigure plumbing with professional water hammer arrestors and proper pipe support

Estimated Cost: $150 - $400

When to Call a Professional

If water hammer persists after installing arrestors or reducing pressure

If there are signs of leaking or damaged pipes

Preventive Maintenance

• Install water hammer arrestor on dishwasher supply line: Banging noise from pressure shock
  Frequency: one‑time installation
• Check supply line support and secure against movement: Movement and vibration that can exacerbate noise
  Frequency: annually

Frequently Asked Questions

Why is my Asko Dishwasher water hammer?

The water hammer is usually caused by rapid valve closure, creating pressure shock in the supply line.

How do I fix Asko Dishwasher water hammer myself?

You can install a water hammer arrestor or slightly reduce the water pressure at the shutoff valve.

How much does it cost to fix water hammer?

Professional repairs to reconfigure plumbing and install water hammer arrestors typically cost between $150 and $400.

When should I call a technician for water hammer?

Consider calling a technician if DIY solutions don't resolve the issue or if the problem persists.

References & Sources

• Water hammer phenomenon explanation and plumbing fixes Community

Common Issues Reported by Users

• Faulty water inlet valve (2 mentions)

User Suggested Solutions

1. Replace the fill valve of the dishwasher

Community Discussions

sporadic water hammer in pipes when powered on but not running a cycle

The fill valve of the dishwasher may be causing the issue.

Pro needed View on Reddit →

Source: Reddit r/appliancerepair