Bosch Dishwasher: not filling
What is this symptom?
Is your Bosch dishwasher not filling with water? This issue may leave your appliance dry at the start or during a wash cycle. Common causes include a closed water supply valve, clogged inlet valve, or a malfunctioning float switch. Identifying the problem early can help you restore functionality and avoid further complications.
Important Tips for Bosch Models
- Bosch official support recommends checking water supply valve, hoses, water pressure and filter blockage before further troubleshooting.
- Bosch may display error codes like E17/E18 for low water supply issues indicating fill problems.
Possible Causes
Water supply valve closed or supply hose blocked/kinked
How to Identify: Dishwasher gets no water; the household water valve under sink is off or the supply hose is visibly kinked
Part: Water supply valve / inlet hose
Low household water pressure
How to Identify: Low flow from faucet when testing pressure (~<10 L/min, dishwasher still won’t fill
Part: Household plumbing, supply line
Clogged or defective water inlet valve
How to Identify: Dishwasher hums during fill but no water enters; inlet valve screen shows debris or mineral buildup
Part: Water inlet valve
Float switch assembly stuck or malfunctioning
How to Identify: Float stuck in raised position, preventing fill signal; float does not move freely up/down
Part: Float / float switch
Door latch or door switch not engaging
How to Identify: Dishwasher won’t start cycle or fill until door is fully latched, no fill signal
Part: Door latch / door switch
Control board or electronic control failure
How to Identify: No components receive power, error codes, dishwasher unresponsive beyond fill issue
Part: Control board
DIY Solutions
Check and ensure water supply valve is open
- Locate the water supply valve under the sink where the dishwasher supply line connects
- Turn the valve fully to the open position
- Run a short cycle to check if water now enters
Inspect and straighten supply hose
- Pull the dishwasher out slightly from under the counter
- Inspect the water supply hose for kinks or twists
- Straighten the hose and ensure nothing is blocking it
- Run cycle to check fill status
Clean water inlet valve filter
- Turn off water supply and disconnect power
- Locate the water inlet valve at the bottom front of dishwasher
- Remove and inspect filter screen on inlet valve for mineral buildup or debris
- Clean screen with brush and reconnect valve
- Restore water and power, then test dishwasher fill
Free and inspect float switch
- Open dishwasher and locate float assembly at bottom
- Gently lift and lower float to ensure free movement
- Remove debris around float if present
- If float sticks still, consider replacing float assembly
Next step
Choose the next step for not filling
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Water Inlet Valve
Controls the flow of hot and cold water into the appliance.
- Typical part-only price
- $25 - $60
- 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.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Float Switch
Detects the maximum water level to prevent overflow and potential flooding.
Door or Lid Switch
Detects whether the appliance door or lid is safely closed before operation.
Main Control Board
The central brain of the appliance that controls all components, cycles, and timings.
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.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
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.
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.
Braided Dishwasher Inlet Hose
For replacement of an externally damaged supply hose. Verify connection size, length, and appliance installation requirements before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Professional Repairs
Replace water inlet valve
Replace float switch assembly
Control board replacement/diagnosis
When to Call a Professional
Preventive Maintenance
-
Clean dishwasher filter regularly: Drain blockages that can hinder proper fill cycles
Frequency: monthly -
Inspect water supply hose for kinks or damage: Supply blockage causing no fill issues
Frequency: annually
Frequently Asked Questions
Why is my Bosch Dishwasher not filling?
How do I fix Bosch Dishwasher not filling myself?
How much does it cost to fix not filling?
When should I call a technician for not filling?
References & Sources
Community Analytical Insights
Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions
Common Issues Reported by Users
- Flow meter failure (2 mentions)
- Water inlet unit failure (1 mentions)
User Suggested Solutions
-
Replacement of flow meter
-
Replacement of water inlet unit
Limited-source guidance; percentages and success-rate claims are not shown
View
Sources
Data compiled from real discussions on r/appliancerepair and r/Appliances:
Community Discussions
Bosch dishwasher stops at beginning of cycle
The issue was caused by a seizing impeller wheel in the water inlet unit, which required replacement of the entire unit.
Error code E18 - failure to fill
Flow meter replacement is being attempted as a fix.
Source: Reddit r/appliancerepair
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