Bosch Dishwasher: not filling with water

Possible Causes

Water supply valve closed or low water pressure

How to Identify: The water supply valve under the sink may be closed or not fully open; low water pressure measured at faucet (<10 L/min indicates insufficient supply.

Part: Water supply valve / household water line

Faulty or clogged water inlet valve

How to Identify: Dishwasher hums but no water enters; inlet valve screen clogged with debris; continuity test fails.

Part: Water inlet valve

Door latch or door switch failure

How to Identify: Dishwasher won’t start or acknowledge door closed; latch doesn’t click or door switch fails continuity test.

Part: Door latch / door switch

Control board or electronic signaling faults

How to Identify: Dishwasher does not send signal to inlet valve; issues persist after other causes eliminated; reset doesn’t help.

Part: Control board / electronic control

DIY Solutions

Verify and open water supply

Easy 5-10 minutes

Tools Needed: none

1. Locate the water supply valve under the sink connected to dishwasher line.
2. Turn valve fully open and run kitchen faucet to ensure water is flowing (approx.10 L/min).

⚠️ Safety First: Ensure no leaks when turning on water supply.

Inspect and straighten water supply hose

Easy 10-15 minutes

Tools Needed: none

1. Pull dishwasher out slightly from under counter.
2. Inspect supply hose for kinks or bends and straighten them.
3. Check for visible damage; replace hose if needed.

⚠️ Safety First: Turn off water supply before detaching hose.

Clean float assembly and ensure free movement

Moderate 15-30 minutes

Tools Needed: screwdriver (if needed)

1. Open dishwasher and remove lower rack to access float.
2. Gently lift and lower the float to clear debris.
3. If needed, remove cover and clean any obstructions around float path.

⚠️ Safety First: Disconnect power before working inside dishwasher.

Professional Repairs

Replace water inlet valve

Estimated Cost: $50 - $150

Replace float switch or assembly

Estimated Cost: $30 - $100

Control board diagnostic and repair

Estimated Cost: $150 - $400

When to Call a Professional

Water inlet valve clogged internally or electrically failed

Float switch or assembly damaged beyond simple cleaning

Door switch/latch faulty and DIY tests inconclusive

Control board suspected

Preventive Maintenance

• Clean float assembly and filters: Float sticking and water intake issues
  Frequency: monthly
• Inspect supply hose: Kinks or blockages in water supply line
  Frequency: annually

Frequently Asked Questions

Why is my Bosch Dishwasher not filling with water?

Common causes include a closed water supply valve, a clogged water inlet valve, or a faulty door latch.

How do I fix Bosch Dishwasher not filling with water myself?

Check the water supply valve, inspect the supply hose for kinks, and clean the float assembly.

How much does it cost to fix not filling with water?

Professional repair costs range from $50 to $400 depending on the issue.

When should I call a technician for not filling with water?

If DIY solutions don't resolve the issue, or if you suspect a control board problem, call a technician.

References & Sources

• Bosch Dishwasher running with no water troubleshooting Official
• Bosch Dishwasher not filling support Official
• Fixing a Bosch Dishwasher Not Filling With Water Repair-Blog

Can I Fix This Myself?

100%

DIY Success Rate Difficulty: DIY

Common Issues Reported by Users

• Faulty water inlet valve (2 mentions)

User Suggested Solutions

1. Check for water in the flood pan and ensure the float switch is not triggered

   Success rate: 33.0%

2. Replace the heat pump

   Success rate: 33.0%

Community Discussions

Pump running nonstop, no fill

Check for water in the flood pan and ensure the float switch is not triggered. If water is present, remove it and test the dishwasher again.

DIY View on Reddit →

dishwasher not working, E21 error code

replaced the heat pump

DIY View on Reddit →

Source: Reddit r/appliancerepair