ApplianceField Lab
No-drain case · GE Monogram ZDT985SIN6II

Two Inactive Pumps Made a Single Bad Pump Less Convincing

The useful clue was broader than standing water: diagnostic mode failed to start both circulation and drain. That put supply, wiring and control commands ahead of blind board replacement.

GE Monogram zdt985sin6ii No Drain And Both Pumps Inactive In Diagnostics
Case snapshot

What the source establishes

  • The dishwasher retained water and showed no reported error code.
  • Neither the circulation pump nor the drain pump started in diagnostic mode.
  • The wiring near the board was visually checked and appeared intact to the technician.
  • The proposed sequence was to check commanded 120 volts at the drain pump, inspect for pump debris and verify the air gap before replacing the board.
  • No voltage result or completed repair was reported.

A similar symptom can have a different cause on another appliance or model.

Diagnostic process

How the evidence narrowed the diagnosis

Complaint

Water remained inside

No error code was reported with the no-drain condition.

Diagnostic mode

Neither pump started

The circulation and drain functions were both inactive under direct tests.

Decision test

Check the pump command before the board

Voltage at the load separates an absent command from a pump or obstruction that cannot respond.

What the evidence supports

What the evidence supports

The evidence supports testing the shared command and wiring path before treating the drain pump as the only fault. It does not confirm the control board.

What to do next

What should be verified next

Qualified service should verify model-specific supply and commanded voltage, inspect the pump for debris and check the air gap. Record which direct tests fail before selecting a board or pump.

Continue with comparable evidence

Cases closest to this diagnosis

Same appliance family Bosch E24 Returned After the Drain Pump Was Replaced A Bosch drained completely after a new drain pump but E24 returned. The case explains why circulation-pump rotor play became the next check. Same appliance family Cove DW24 Error 800140: Start with the Drain Path A real Cove DW24 case explains what error 800140 supports, what it does not prove, and how to separate the drain pump, hose and … Same appliance family Frigidaire Gallery Dishwasher Er and ErCl: Keypad or Interface Path A Frigidaire Gallery Er code leads through stuck keys, keypad wiring and the user interface before a main-board replacement is considered.
Water and live-voltage safety: disconnect power and remove standing water before inspection. Measuring 120 volts at a pump is qualified-service work and should not be attempted by a homeowner.
Fresh field notes

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