Circulation Pump and Motor Assembly, Sump Motor Assembly, Pump Motor Unit, Wash Pump Motor, Circulation Motor Assembly, Mechanism S/S Assembly

1811038, AH10059439, AH3486941, EA10059439, EA3486941, PS10059439, PS3486941, 1155395, AH12074054, EA12074054

GE, General Electric, Hotpoint, RCA, Haier, Monogram, Café, Profile

GEGDF510PSMSS, GDF510PGMWW, GDF510PGMBB, GDF510PGMCC, GDF520PSMSS, GDF520PGMWW, GDF520PGMBB, GDF520PGMCC, GDF530PSMSS, GDF530PGMWW, GDF530PGMBB, GDF530PGMCC, GDF540HSMSS, GDF540HGMWW, GDF540HGMBB, GDF540HGMCC, GDF550HSMSS, GDF550HGMWW, GDF550HGMBB, GDF550HGMCC, GDF560SSMSS, GDF560SGMWW, GDF560SGMBB, GDF560SGMCC

General ElectricGDT550HSMSS, GDT550HGMWW, GDT550HGMBB, GDT550HGMCC, GDT560SSMSS, GDT560SGMWW, GDT560SGMBB, GDT560SGMCC, GDT580SSMSS, GDT580SGMWW, GDT580SGMBB, GDT580SGMCC, GDT590SSMSS, GDT590SGMWW, GDT590SGMBB, GDT590SGMCC

HotpointHDF510PSMSS, HDF510PGMWW, HDF510PGMBB, HDF510PGMCC, HDF520PSMSS, HDF520PGMWW, HDF520PGMBB, HDF520PGMCC, HDF530PSMSS, HDF530PGMWW, HDF530PGMBB, HDF530PGMCC

RCARDF510PSMSS, RDF510PGMWW, RDF510PGMBB, RDF510PGMCC, RDF520PSMSS, RDF520PGMWW, RDF520PGMBB, RDF520PGMCC

HaierHDF510PSMSS, HDF510PGMWW, HDF510PGMBB, HDF510PGMCC, HDF520PSMSS, HDF520PGMWW, HDF520PGMBB, HDF520PGMCC

MonogramZDF510PSMSS, ZDF510PGMWW, ZDF510PGMBB, ZDF510PGMCC, ZDF520PSMSS, ZDF520PGMWW, ZDF520PGMBB, ZDF520PGMCC

CaféCDF510PSMSS, CDF510PGMWW, CDF510PGMBB, CDF510PGMCC, CDF520PSMSS, CDF520PGMWW, CDF520PGMBB, CDF520PGMCC

ProfilePDF510PSMSS, PDF510PGMWW, PDF510PGMBB, PDF510PGMCC, PDF520PSMSS, PDF520PGMWW, PDF520PGMBB, PDF520PGMCC

Professional Repair Time: 30-45 minutes
DIY Repair Time: 45-60 minutes
Difficulty Rating: Moderate to Advanced (2.5/5) — Requires basic tools, moderate to advanced mechanical skill, attention to multiple hose connections and wire connections, may require tipping dishwasher for access

1. Turn off power to the dishwasher at the circuit breaker to ensure complete power disconnection.
2. Unplug the dishwasher from the wall outlet for additional safety.
3. Verify power is off by attempting to start the dishwasher. The dishwasher should not respond.
4. Turn off the water supply to the dishwasher at the shutoff valve under the sink.
5. Open the dishwasher door fully to access the interior.
6. Remove the upper and lower dish racks to provide working space and access to the circulation pump and motor area.
7. Take multiple photos of the circulation pump and motor assembly location, mounting, hose connections, and wire connections before disassembly. Document from multiple angles. This is absolutely critical for proper reassembly.
8. Remove the spray arms by unscrewing the center cap (typically twist counterclockwise) and lifting the spray arms off the mounting posts.
9. Remove the filter assembly by lifting it straight up out of the sump area.
10. Locate the circulation pump and motor assembly mounted at the bottom of the dishwasher tub (typically in the center area of the tub beneath the filter assembly).
11. Take detailed photos of all connections to the circulation pump and motor assembly before disconnecting: wire harness connectors, water inlet hoses, water outlet hoses, and mounting brackets.
12. Tip the dishwasher backward carefully to access the underside of the dishwasher. Have a helper support the dishwasher while you work. Place padding under the dishwasher to protect the floor and the unit.
13. Remove the lower access panel (if equipped) by removing the screws securing it to the dishwasher frame.
14. Locate the circulation pump and motor assembly from underneath the dishwasher.
15. Disconnect the wire harness connectors from the circulation pump and motor assembly by pressing the locking tabs and pulling the connectors straight off. Do not pull on the wires—grasp the connector bodies. There may be multiple connectors.
16. If the assembly is hardwired (no connectors), note the wire colors and terminal positions before disconnecting. Label each wire with masking tape.
17. Carefully disconnect the wires from the assembly terminals. Use masking tape to label each wire indicating its original terminal position.
18. Locate the water inlet hose connection to the circulation pump and motor assembly (typically a single inlet from the sump).
19. Disconnect the inlet hose from the assembly by loosening the hose clamp (typically a screw-type clamp or spring clamp) and pulling the hose off the inlet port. Have a towel ready to catch any residual water.
20. Locate the water outlet hose connections to the spray arms (typically one or two outlet connections).
21. Disconnect the outlet hoses from the assembly by loosening the hose clamps and pulling the hoses off the outlet ports.
22. Locate the circulation pump and motor assembly mounting bracket that secures the assembly to the dishwasher tub or frame (typically 3-6 mounting screws or clips).
23. Remove the mounting screws or clips using a Phillips screwdriver, nut driver, or socket wrench.
24. Carefully remove the old circulation pump and motor assembly from the dishwasher. Support the assembly as you remove the last mounting fastener to prevent it from falling.
25. Place the old circulation pump and motor assembly on a clean work surface with adequate space for inspection.
26. Inspect the old assembly for visible damage such as cracks in the housing, debris blockage, corrosion, discoloration, or water leakage. This confirms the diagnosis.
27. Inspect the water hoses for cracks, splits, or damage. Replace hoses if they are damaged or deteriorated.
28. Inspect the hose clamps for corrosion or damage. Replace clamps if they are damaged or cannot tighten securely.
29. Inspect the circulation pump and motor assembly mounting location on the dishwasher tub or frame for damage, corrosion, or debris. Clean the mounting area if necessary using a dry cloth.
30. Unpack the new WG04F01873 circulation pump and motor assembly from its packaging. Handle carefully to avoid damaging the assembly housing or connections.
31. Verify the assembly specifications match the old assembly: motor wattage (typically 100-120 watts), voltage (120V AC), frequency (60 Hz), mounting bracket design, hose connection ports, wire terminal positions.
32. Compare the new assembly to the old one to verify the dimensions, connection ports, mounting holes, and overall appearance match. Ensure you have the correct replacement part.
33. Inspect the new circulation pump and motor assembly for any damage or defects before installation. The housing should be intact with no cracks or damage, and the connection ports should be clean and undamaged.
34. Position the new circulation pump and motor assembly in the dishwasher, aligning the mounting holes with the bracket or frame mounting points.
35. Install the mounting screws or clips to secure the assembly to the dishwasher tub or frame. Tighten gently but firmly—do not overtighten, which can crack the assembly housing.
36. Verify the assembly is securely mounted and does not wobble or shift when gently pressed.
37. Connect the inlet hose to the assembly inlet port by sliding the hose onto the port and tightening the hose clamp securely. The clamp should be tight enough that the hose cannot be pulled off by hand.
38. Connect the outlet hoses to the assembly outlet ports by sliding the hoses onto the ports and tightening the hose clamps securely.
39. Verify all hose connections are secure and do not leak when water pressure is applied (this will be tested later).
40. Reconnect the wire harness connectors to the new circulation pump and motor assembly by pushing the connectors straight onto the assembly terminals until they click into place (if the original assembly had connectors). There may be multiple connectors.
41. If the assembly is hardwired, reconnect the wires to the correct terminals using your labeled wires. Match each wire to its original terminal position.
42. Verify all wire connections are secure by gently tugging on each wire or connector. Wires should not pull off—they should be firmly seated.
43. Return the dishwasher to its upright position carefully with your helper's assistance.
44. Reinstall the lower access panel (if equipped) by securing it with the mounting screws.
45. Reinstall the filter assembly by placing it into the sump area and ensuring it seats properly.
46. Reinstall the spray arms by placing them onto the mounting posts and securing them with the center caps (twist clockwise to tighten).
47. Reinstall the upper and lower dish racks in the dishwasher.
48. Close the dishwasher door fully.
49. Restore power at the circuit breaker and plug in the dishwasher.
50. Turn on the water supply at the shutoff valve.
51. Test the new circulation pump and motor assembly by starting a short wash cycle (empty dishwasher, no dishes).
52. Monitor the dishwasher during the wash phase of the cycle. Listen for the circulation pump motor activation (humming sound).
53. Verify water is spraying from the spray arms during the wash cycle. Water pressure should be strong and consistent.
54. Verify no water is leaking from the circulation pump and motor assembly or hose connections during the wash cycle.
55. Stop the cycle and open the door to verify the assembly is operating properly.
56. Run a complete wash cycle (empty dishwasher, no dishes) to verify the circulation pump and motor assembly operates properly throughout the entire cycle.
57. Verify water is circulating properly through the spray arms during the entire wash cycle.
58. Listen for unusual noises such as grinding, squealing, or rattling from the circulation pump and motor area. The motor should operate quietly with only a faint humming sound.
59. Verify no water is leaking from the circulation pump and motor assembly or connections during normal operation.
60. Monitor the dishwasher for 3-5 complete wash cycles to ensure the circulation pump and motor assembly operates properly without issues.

Safety Notes: Always turn off power at the circuit breaker and unplug the dishwasher before working on it to prevent electrical shock. Turn off the water supply to prevent water damage. Ensure all hose connections are tight and secure before restoring power and water. Loose hose connections can cause water leakage and damage. This repair requires basic tools (Phillips screwdriver, nut driver, socket wrench) and moderate to advanced mechanical skill—homeowners with significant DIY experience can complete this repair successfully with proper precautions. Use caution when tipping the dishwasher backward—have a helper assist and use padding to protect the floor and unit.

1. Test the old motor with a multimeter to confirm failure before ordering. Use a multimeter set to resistance (ohms) mode to test the motor windings. A functioning motor should show resistance between 10-50 ohms (varies by model). Infinite resistance (no continuity) indicates a burned-out motor. Zero resistance indicates a short circuit. Testing prevents unnecessary assembly replacement.
2. Document all connections with detailed photos before disconnecting. Take clear photos of all wire harness connector orientations, wire colors, terminal positions, and hose connection points before removing the old assembly. This documentation prevents wiring errors and ensures correct hose routing that can cause water leakage or improper circulation.
3. Verify hose clamps are tight and secure before restoring power and water. Loose hose connections are the #1 cause of water leakage after assembly replacement. Use a nut driver to tighten hose clamps securely. The clamp should be tight enough that the hose cannot be pulled off by hand.
4. Check for debris blockage in the pump housing and water passages before installing the new assembly. Food particles, broken glass, or other debris can block the pump impeller or water passages, causing poor water circulation. Remove the old assembly and inspect the pump housing, impeller chamber, and water passages for blockages. Clear any debris before installing the new assembly to prevent repeat failure.
5. The circulation pump and motor assembly works in conjunction with the dishwasher control board. The control board activates the circulation pump and motor during the wash cycle and controls the motor speed for different wash cycles. If the dishwasher still has circulation problems after assembly replacement, the control board may be faulty. Test the control board before ordering a replacement assembly to avoid unnecessary replacement.
6. Verify the spray arm water inlet is not blocked. A blocked spray arm inlet can prevent water from reaching the spray arms even with a new circulation pump and motor assembly. Inspect the spray arm inlet port on the dishwasher tub and clear any debris or mineral deposits before testing the new assembly.
7. The circulation pump and motor assembly should operate quietly with only a faint humming sound. After installing the new assembly, listen carefully during the wash cycle. The motor should produce a faint humming sound without grinding, squealing, or rattling. Unusual noises indicate improper installation, debris blockage, or other problems. Stop the dishwasher immediately and verify the installation if unusual noises occur.
8. Verify the spray arms rotate freely during the wash cycle. The circulation pump and motor assembly provides water pressure that rotates the spray arms. If the spray arms do not rotate, the water pressure may be insufficient or the spray arms may be blocked. Check that the spray arms rotate freely and are not blocked by dishes or debris.
9. The circulation pump and motor assembly is a wear item with limited lifespan. Dishwasher circulation pump and motor assemblies typically last 5-10 years depending on usage and water quality. Plan for eventual replacement as part of routine maintenance. Replace the assembly promptly when failure is detected to prevent water damage and poor cleaning performance.
10. This repair is cost-effective compared to dishwasher replacement. The cost of circulation pump and motor assembly replacement ($100-180) is far less than the cost of a new dishwasher ($600-1,500+). Replace the assembly promptly when failure is detected to prevent the need for expensive dishwasher replacement and to restore proper cleaning performance.

• Dishwasher not washing properly (poor cleaning performance)
• Weak water spray from spray arms
• Dishwasher not circulating water during wash cycle
• Unusual grinding, squealing, or rattling noises from pump area
• Water leaking from pump or sump area
• Dishwasher stopping mid-cycle
• Error codes displayed on control panel (wash or circulation error codes)
• Dishwasher running but no water pressure in spray arms
• Motor not activating during wash cycle
• Spray arms not rotating or rotating slowly
• Dishes not getting clean
• Water not reaching upper spray arm