If your dishwasher starts a cycle but no water enters the machine, it won’t be able to clean your dishes properly. You may hear the appliance running, but when you open the door, the interior is dry or only slightly damp.

This problem is quite common and is often caused by simple issues such as a blocked filter or a water supply problem. In some cases, a faulty component may need replacing.

In this guide we explain why a dishwasher may not be filling with water and how to fix it.

1. The Water Supply Is Turned Off

The first thing to check is the water supply to the dishwasher.

If the supply valve is closed or partially shut, water will not enter the appliance.

What to check

• Ensure the water supply tap is fully open
• Check for any leaks or loose connections
• Confirm water is reaching the inlet hose

2. A Kinked or Blocked Inlet Hose

The inlet hose carries water from your plumbing system into the dishwasher.

If the hose is bent, twisted, or blocked, it can restrict water flow.

Signs this may be the issue

• The dishwasher starts but remains dry
• The machine makes a faint humming sound
• The hose appears bent behind the appliance

Straightening or replacing the hose can often solve the problem.

3. A Blocked Inlet Filter

Dishwashers typically have a small filter inside the inlet valve to prevent debris from entering the machine.

Over time this filter can become clogged with limescale or sediment.

How to check

1. Turn off the water supply
2. Disconnect the inlet hose
3. Locate the small filter inside the valve
4. Clean away any debris

Cleaning the filter can restore proper water flow.

4. A Faulty Water Inlet Valve

The inlet valve controls when water enters the dishwasher.

If this component fails, it may not open when the cycle begins.

Common symptoms

• No water entering the machine
• The dishwasher attempts to start but stops
• The cycle runs without filling

Replacing the inlet valve is often necessary if it is faulty.

5. A Faulty Door Switch

Dishwashers are designed not to operate unless the door is fully closed.

If the door switch or latch is not working properly, the machine may not fill with water.

Possible signs

• The dishwasher does not start properly
• The cycle stops immediately
• No water enters the machine

Ensuring the door closes securely—or replacing the latch if needed—can fix this issue.

6. A Problem With the Float Switch

The float switch monitors the water level inside the dishwasher.

If it becomes stuck in the “full” position, it may prevent water from entering the appliance.

Signs of a float switch issue

• The dishwasher remains empty
• The cycle does not progress correctly
• Water never enters the machine

Cleaning or replacing the float switch may be required.

7. Control Board or Electrical Faults

If all other components appear to be working correctly, the issue may lie with the control system.

The control board sends signals to the inlet valve and other components.

Possible symptoms

• The dishwasher powers on but does not fill
• The cycle behaves unpredictably
• No response from key components

Electrical faults may require further inspection.

How This Relates to Other Dishwasher Problems

Water filling issues are often connected to other faults.

For example:

• If your dishwasher fills but does not empty, see dishwasher not draining – causes and fixes
• If the dishwasher runs but dishes remain dirty, read dishwasher not cleaning properly – causes and fixes

Linking these guides helps users find the exact problem quickly.

When Replacement Parts May Be Needed

If cleaning and checks do not solve the issue, some components may need replacing.

Common parts linked to filling problems include:

• inlet valves
• inlet hoses
• door latches
• float switches

Replacing the faulty part can restore normal operation.

You can find a range of dishwasher spare parts from Yourspares for many appliance brands.

Preventing Water Filling Problems

A few simple steps can help avoid this issue in the future.

Helpful tips

• Check hoses regularly for kinks
• Clean inlet filters occasionally
• Ensure the water supply is fully open
• Avoid pushing the dishwasher too tightly against the wall

Final Thoughts

If your dishwasher is not filling with water, the cause is often a simple issue such as a blocked filter or a restricted hose. By checking these areas first, you may be able to fix the problem quickly.

If a component is faulty, replacing the correct part can restore your dishwasher and keep it working efficiently.

If your dishwasher fills but does not empty properly, the issue may be related to drainage. See our guide on dishwasher not draining – causes and fixes.

If your dishwasher runs but dishes are still dirty, the issue may be related to water flow or spray performance. Read our guide on dishwasher not cleaning properly and how to fix it.