Repair Summary
- City
- Pleasanton, CA
- Appliance
- Samsung built-in dishwasher
- Replacement Parts
- Dishwasher drain pump with manufacturer marking HANNU B20-3A01
- Problem
- The dishwasher displayed a leak error and would not operate normally.
- Diagnosis
- Inspection beneath the dishwasher confirmed that water was leaking from the drain pump area
- Cause
- The drain pump assembly was leaking and could no longer keep the dishwasher's drain circuit watertight.
- Repair
- We removed the dishwasher for access, disconnected the failed drain pump, installed the replacement pump, restored the wiring and hose connections, reassembled the appliance, and tested it for leaks.
- Result
- The leak was eliminated, the error condition cleared, and the Samsung dishwasher operated normally during final testing.
Location: Pleasanton, CA
Appliance: Samsung built-in dishwasher
Model: DW80R2031US/AA, version 00; serial B08AG8DTC03096D
Replacement part used: Dishwasher drain pump with manufacturer marking HANNU B20-3A01. The official Samsung service part number was not visible in the supplied photos.
Customer complaint: The dishwasher displayed a leak error and would not operate normally.
Diagnosis: Inspection beneath the dishwasher confirmed that water was leaking from the drain pump area. Water tracks and residue around the lower pump assembly identified the source.
Cause: The drain pump assembly was leaking and could no longer keep the dishwasher's drain circuit watertight.
Repair completed: We removed the dishwasher for access, disconnected the failed drain pump, installed the replacement pump, restored the wiring and hose connections, reassembled the appliance, and tested it for leaks.
Result: The leak was eliminated, the error condition cleared, and the Samsung dishwasher operated normally during final testing.
Samsung dishwasher leak error diagnosis in Pleasanton
The customer in Pleasanton requested dishwasher service after the Samsung unit reported a leak error. A leak warning should not be cleared repeatedly without locating the source because even a small amount of water beneath a built-in dishwasher can damage cabinets, flooring, wiring, and nearby components.
We opened the lower area and removed the dishwasher from the cabinet far enough to inspect the base, pump assemblies, hoses, and connections. Water staining around the drain pump area confirmed that this was an active component leak rather than water left near the sink or a simple door spill.
Leak found at the dishwasher drain pump
The drain pump removes used wash water from the sump and sends it through the drain hose. Its housing and seals must remain watertight while the pump runs. In this case, the leak originated at the drain pump assembly, so tightening unrelated hoses or resetting the control would not provide a reliable repair.
The underside inspection gave direct access to the pump, sump, drain hose, electrical connectors, and surrounding base. We documented the component layout before disconnecting anything so every hose and wire could be returned to its correct position.
Drain pump replacement
After confirming the leak source, we removed the failed drain pump and installed the matching replacement assembly. The pump was seated correctly, its electrical connection and drain path were restored, and the surrounding area was checked before the dishwasher was reassembled.
The visible manufacturer marking on the photographed pump is HANNU B20-3A01, rated AC 120V, 60Hz, 0.7A. This is a component marking recorded from the repair photo, not a confirmed Samsung catalog service number. Replacement parts should always be matched to the complete appliance model and revision.
Samsung DW80R2031US model information
The appliance data label identifies this dishwasher as Samsung model DW80R2031US/AA, version 00, serial B08AG8DTC03096D. The label also shows a December 2022 production date.
Checking the complete model suffix and version is important before ordering a pump because visually similar Samsung dishwashers can use different drain components or revisions.
Final leak test and result
After the new drain pump was installed, the dishwasher was reassembled and tested through operation and draining. No water escaped from the replacement pump or its connections, and the leak warning did not return.
The dishwasher was returned to its installed position and normal operation. The customer confirmed that the repair resolved the problem.
Dishwasher repair in Pleasanton
24FAR provides local dishwasher repair in Pleasanton, appliance repair in Pleasanton, and dishwasher repair service for Samsung and other major brands.
If your dishwasher displays a leak warning, leaves water underneath, or leaks while draining, stop using it until the source is identified. Book repair online or call (510) 999-6091.
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