Bosch Dishwasher: error code E-31, not draining properly
What is this symptom?
If your Bosch dishwasher displays error code E-31 and is not draining properly, you may notice standing water in the tub after cycles. This issue can stem from a clogged filter, debris in the pump area, or a kinked drain hose. Understanding these causes can help you address the problem effectively.
Possible Causes
Internal dishwasher error E31 related to Zeolith drying system fault (Bosch-specific)
How to Identify: Error E31 appears specifically as per Bosch documentation related to drying system issue, not water draining; cooling/drying phase may fail.
Part: Zeolith drying system / heating element
Clogged filter or debris in pump area restricting drainage
How to Identify: Standing water in base with no unusual error code for pump; visible debris in filter screen; water doesn’t drain when cycle completes.
Part: Filter assembly, drain pump inlet
Clogged or kinked drain hose
How to Identify: Visual kinks or blockage in hose under sink connection, water backs up into dishwasher.
Part: Drain hose
Next step
Choose the next step for error code E-31, not draining properly
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
Heating Element
Heats the water or air inside the appliance to the required temperature.
- Typical part-only price
- $40 - $95
- DIY difficulty
- Medium
- Estimated time
- 30-45 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.
Dishwasher Filter
Screens food debris from recirculating wash water and protects the pump system.
Drain Pump
Pumps waste water out of the appliance during the drain cycle.
Drain Hose
Carries waste water from the drain pump to your home's standpipe or sink drain.
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.
Preventive Maintenance
-
Clean filters and drain area: Drain blockages that lead to standing water
Frequency: monthly -
Inspect drain hose: Kinks and buildup that restrict drainage
Frequency: annually
Frequently Asked Questions
Why is my Bosch Dishwasher error code E-31, not draining properly?
How do I fix Bosch Dishwasher error code E-31, not draining properly myself?
How much does it cost to fix error code E-31, not draining properly?
When should I call a technician for error code E-31, not draining properly?
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
- Clogged drain filter or hose
- Faulty drain pump
- Blocked or kinked drain hose
- Faulty pressure switch
- Air gap issue
User Suggested Solutions
-
Check and clean the drain filter and hose. Disconnect the dishwasher from power, remove the bottom spray arm, and take out the filter. Clean any debris and ensure the hose is clear of obstructions.
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Inspect and test the drain pump. Access the pump by removing the lower spray arm and filter. Check for blockages and test the pump with a multimeter for continuity.
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Examine the drain hose for kinks or blockages. Ensure the hose is properly connected and not pinched. If damaged, replace the hose.
-
Test and replace the pressure switch if necessary. Access the switch, check for proper operation, and replace if faulty.
-
Check the air gap for blockages. Inspect the air gap located on the sink or countertop and clean any debris that may be obstructing it.
Limited-source guidance; percentages and success-rate claims are not shown
View
Sources
Data compiled from real discussions on r/appliancerepair and r/Appliances:
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