Error Code: E31 Difficulty: Hard
Problem: Indicates a problem with the heat pump or moisture sensors related to the drying system. It can also signal a drainage problem where sensors detect residual moisture.
How to Fix E31 Error (Step-by-Step)
- Disconnect the dishwasher from power by unplugging it or switching off the circuit breaker. Turn off the water supply line, typically found under the sink.
- Carefully slide the dishwasher out from under the counter. You may need to remove mounting screws securing it to the countertop.
- Lay the dishwasher on its back on a towel or blanket to access the components underneath. Remove the bottom access panel, which is usually held by a few screws.
- Locate the heat pump assembly, which is a large component connected to the central sump. Have a towel ready to catch any residual water. Carefully disconnect the wire harnesses and the hoses attached to the old pump.
- Release the locking tabs or twist the old heat pump to remove it from the sump assembly. It may be a tight fit, so gentle but firm pressure is needed.
- Install the new heat pump, ensuring the rubber gasket is properly seated to prevent leaks. Lock it securely into place by twisting it until the tabs click.
- Reconnect all hoses and electrical connectors to the new pump. Re-install the bottom access panel, carefully set the dishwasher upright, and slide it back into place. Reconnect the power and water supply, then run a test cycle to check for proper operation and leaks.
- Turn the appliance off, wait about 2 minutes, then turn it back on.
What to Check Next on This Bosch Dishwasher
Bosch Dishwasher Error E31: Use the code or symbol as the starting clue, then confirm the actual symptom before ordering parts.
- Confirm whether the display is a normal cycle/status symbol or a recurring fault that stops operation.
- Check water supply, filter, sump, spray arms, drain path, and door latch before replacing electronic parts.
- If the same problem returns after basic checks, inspect the matching sensor, pump, heater, wiring, or control path based on the symptom.
If the issue returns after these checks, match replacement parts to the complete Bosch model number from the appliance tag. The same code can point to different components depending on the exact model and when the failure appears.
Recommended Parts to Check
No exact official OEM part number is listed here because the correct Bosch dishwasher part can vary by complete model number. These are targeted part-category searches, not universal fit claims.
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Bosch dishwasher water inlet valveCommon replacement category: Water inlet valveFit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for fill and water-supply faults after the tap, hose, and inlet screen are checked. -
Bosch dishwasher drain pumpCommon replacement category: Drain pumpFit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for drain and standing-water symptoms after the filter, sump, and hose are checked. -
Bosch dishwasher circulation pumpCommon replacement category: Circulation pump / wash motorFit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for wash, spray-arm, and circulation symptoms after filters and spray arms are checked.
Before ordering: match the part to the complete Bosch dishwasher model number on the appliance tag.
When It’s Better to Replace Than Repair
Dishwasher repairs can add up quickly when the pump, control, heater, or leak-related parts fail.
Confirm cabinet width, water line, drain routing, electrical connection, and panel style before ordering.
For repair parts, verify exact fit with the full dishwasher model number before buying; these links are general replacement-appliance shopping options.
- [OK]Drain pump or circulation pump failure
- [OK]Leaking tub, door, or float-switch issues
- [OK]Heater or control failures on an older unit
- [OK]Repeated poor washing or drying performance
Recommended Dishwasher Replacement Options
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Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
More options (for a better recommendation)
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Expert: Mike Sullivan
EPA Section 608 Certified Technician with 18+ years experience.
Read Editorial Standards →Browse all Bosch error codes: Bosch Error Codes
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