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Quick answer
The original report is an LG dishwasher in a newly renovated Canadian home: the controls light up and chime, the home has water, but the dishwasher does not start its wash action or move water into the tub. A Siemens breaker is not by itself proof that the LG dishwasher is incompatible, and the opened LG guidance does not authorize changing breakers. First turn the dishwasher off, then verify the dedicated electrical connection, the under-sink water shutoff and inlet hose, and the drain route installed during the renovation. If the tub stays dry, focus on supply and inlet setup; if water remains after a cycle, focus on the filter, drain hose, air gap, disposal connection, or a power interruption. Do not open the electrical panel, swap a breaker, pull the built-in unit while wet, or force a pump diagnosis; use a qualified electrician, installer, or LG service when the external checks do not resolve it.
Work through in order
Diagnostic checks
Use only checks that match the exact appliance or system and its official guide.
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Check 1
Turn the dishwasher off and do not change the Siemens breaker, open the electrical panel, or use an extension cord or adapter. Confirm the model label, whether the dishwasher is plugged into its intended accessible outlet or approved connection, and whether the breaker is actually tripped; leave any breaker replacement or wiring inspection to a qualified electrician.
Expected result: The control panel lights and chimes but the breaker is tripped, the outlet/connection is unknown, or the breaker is on and the dishwasher still will not begin its water sequence.
Next step: Keep power off if the breaker trips again, smells hot, sparks, or the connection is questionable. Have the electrician verify the panel/breaker listing and dishwasher circuit, then use LG service for the appliance if supply is correct.
Why this matters
Why: Lights and sounds show that some control power is present, not that the dishwasher has a compliant supply under load. LG's exact installation sheet requires the correct voltage, proper grounding, no extension or adapter, and a qualified electrician when the outlet or wiring is uncertain; it does not say that Siemens breakers are incompatible.
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Check 2
With the dishwasher powered off, open the sink cabinet and check that the dishwasher's water shutoff/inlet valve is open and the inlet hose is not pressed, kinked, or crushed by the new plumbing or cabinet. Do not loosen a compression fitting or pull the built-in dishwasher out to reach a hidden connection.
Expected result: The valve is closed or the inlet hose is bent/pressed, or the valve is open and the hose is clear but the tub stays dry when a cycle is started after power is confirmed.
Next step: Open the accessible valve and straighten only an obvious external bend. If the tub remains dry or the hose cannot be safely accessed, stop and contact the installation technician or LG service.
Why this matters
Why: LG says a closed valve or kinked inlet hose can prevent the specified amount of water from reaching the tub, especially after a new installation. A clear hose does not prove the inlet valve or internal water path is functioning.
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Check 3
Determine whether the tub is dry or retains water after an interrupted cycle. If water remains above the filter, turn the appliance off and inspect only the accessible filter, drain hose under the sink, air gap, and garbage-disposal connection for the LG-documented clog, kink, or unremoved knockout plug.
Expected result: The tub is dry and never filled, or water remains above the filter after a cycle or power interruption.
Next step: Follow only the matching external branch. Do not call a drain symptom a failed pump, and do not pull the built-in unit if there is water under or around it.
Why this matters
Why: A dry tub points toward inlet, start, or electrical sequencing; standing water points toward an outlet/drain path. LG identifies filter residue, a pressed drain hose, air-gap/disposal restrictions, and an unremoved disposal knockout as drain causes.
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Check 4
For a drain symptom, wait until the dishwasher has cooled, remove and rinse the accessible filter as LG describes, and inspect the visible drain hose under the sink for a kink or heavy object. If a new garbage disposal was installed, have the installer verify that its dishwasher knockout was removed; do not strike or dismantle the disposal yourself.
Expected result: The filter contains food residue, the drain hose is pinched, the air gap is blocked, or the disposal connection still has an installation restriction; alternatively, all accessible drain parts are clear.
Next step: Clean and refit the filter, correct only an accessible hose bend, and ask the installer/plumber to correct a new-disposal connection. If water still pools above the filter, request LG service rather than opening the pump area.
Why this matters
Why: LG says residue and hose restrictions can prevent draining, and warns that recently installed units may have an unremoved disposal knockout. A clear external path still does not establish that the internal pump or motor is defective.
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Check 5
If the dishwasher was recently installed or the home lost power during a cycle, record the display, chimes, remaining water, breaker state, model label, and whether the first 45 seconds of a cycle produce a drain sound. Do not repeatedly restart a cycle if the breaker trips, the unit leaks, or water is near electrical parts.
Expected result: The dishwasher resumes and drains after a power interruption, or it still cannot fill, drain, or start with verified power, open water supply, and clear external hoses.
Next step: Provide the technician the exact sequence and renovation date. Use an electrician for circuit/breaker questions, the installer for hose/knockout/connection errors, and LG service for an appliance fault.
Why this matters
Why: LG notes that a power cut or tripped breaker can leave water in the tub and that certain cycles may drain when restarted. Persistent failure after the external installation checks requires inspection, not a guessed breaker or pump replacement.
Use your observations
Decision map
Find the observation that best matches what you see, then follow the next safe action.
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PATH 01Next step
What you see
The control lights work, the breaker is on, but the tub stays dry and the inlet valve is closed or the hose is kinked.
Do this next
Open the accessible valve and straighten the external hose. If the dishwasher still does not fill, contact the installer or LG service without opening the unit.
Why this path and its safety boundary
Why it matters: This is consistent with a newly installed water-supply restriction, not proof of a failed pump or Siemens/LG incompatibility.
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PATH 02Next step
What you see
Water remains above the filter after a cycle, the filter is dirty, the drain hose is pinched, or the air-gap/disposal path is restricted.
Do this next
Turn the dishwasher off, clean and refit the accessible filter, correct only an obvious external hose bend, and have the installer address a disposal knockout or new plumbing connection.
Why this path and its safety boundary
Why it matters: LG identifies these as outlet/drain conditions and distinguishes them from an inlet error.
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PATH 03Next step
What you see
The dishwasher was installed with a new circuit, the breaker trips, the outlet is ungrounded/unknown, or the power connection does not match the manual.
Do this next
Leave the circuit off and have a qualified electrician verify the panel listing, breaker, grounding, voltage, and dedicated connection. Do not run the dishwasher to test a questionable circuit.
Why this path and its safety boundary
Why it matters: The electrical installation is unresolved. A Siemens label alone does not prove that the breaker is wrong, and a homeowner should not rewire or swap protective devices based on a support conversation.
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PATH 04Next step
What you see
Power, water supply, external drain path, filter, and installation connections are verified, but the dishwasher still will not start the water sequence or continues to leave water above the filter.
Do this next
Request LG or qualified dishwasher service and provide the model, display behavior, circuit history, and installation date. Do not pull the built-in unit while wet or replace a pump without diagnosis.
Why this path and its safety boundary
Why it matters: The public LG checks no longer isolate the cause; an inlet valve, pump, motor, control, or another internal component cannot be identified safely from this symptom alone.
Helpful context
Understand the symptom
The title typo does not change the appliance identity
The original lead is titled “LD Dishwasher and Siemens Breaker,” then corrects the title to LG Dishwasher. Its indexed text describes an LG dishwasher in Canada, power and water present, control lights and chimes working, but no water being pumped into the unit or wash cycle starting; it later identifies LG Studio SDWB24S3. The direct Reddit page was not accessible, so it is not a public source here. The official LG material supports the external installation and drainage branches while leaving breaker-brand compatibility to the panel listing, code, and a qualified electrician.
Separate filling from draining before touching the installation
“Not pumping water” can describe two different observations: a dry tub because the dishwasher never receives water, or water left in the tub because it cannot drain. LG's official guide calls these inlet and outlet problems with different checks. Establish which state you have before blaming the pump or the breaker.
When checks do not resolve it
Need a professional?
Use a qualified electrician when the breaker trips, the panel/breaker compatibility or grounding is unclear, or the new circuit does not match the LG installation requirements. Use the installer or plumber for a closed valve, kinked hose, disposal knockout, air-gap, or other new-installation connection. Request LG service when external checks are clear but the dishwasher still cannot fill, drain, or start, or when water is near electrical parts.
Common questions
FAQ
Is a Siemens breaker incompatible with an LG dishwasher?
The opened LG installation material does not state that Siemens breakers are incompatible. It requires the correct voltage, grounding, compliant breaker or fuse, accessible connection, and qualified electrical work. Have an electrician verify the panel's listed breaker type and circuit rather than swapping a breaker based on brand names alone.
Why does an LG dishwasher have power but not pump water into the tub?
First distinguish a dry tub from standing water after a cycle. A dry tub can follow a closed valve or kinked inlet hose; standing water points toward filter, drain hose, air-gap, disposal, or interruption-related drainage. If those accessible branches are clear, LG service is needed to separate an internal valve, pump, motor, or control issue.
What should I check after a new dishwasher installation?
Check that the water valve is open, the inlet and drain hoses are not kinked or crushed, the drain route and disposal connection were prepared correctly, and the electrical connection is grounded and matches the model requirements. LG's exact SDWB24S3 quick-install sheet says improper routing can damage hoses or prevent proper drainage.
Can I pull out the built-in dishwasher to inspect the pump?
Do not pull it out while water or a leak is present, and do not open the pump or electrical area as a first step. LG's guidance limits the initial checks to power-off filter, hose, air-gap, disposal, and supply checks; persistent faults require an installer, electrician, or LG service technician.
Read the exact guide
Official sources
- SDWB24S3 Quick Install & Clearances / LG Studio Top Control Wi-Fi Enabled DishwasherLG Electronics Canada · Exact official LG model document used conditionally because the original lead's indexed text identifies LG Studio SDWB24S3. It supports model identity, water/drain routing, electrical grounding and voltage boundaries, but it does not establish Siemens breaker incompatibility or an internal pump diagnosis.
- How to Fix an LG Dishwasher That Is Not Draining (OE Error)LG USA Support · Official general LG guide used to distinguish standing-water/outlet symptoms from a dry-tub/inlet symptom and to support power-off filter, drain-hose, air-gap, and disposal checks. It explicitly notes that settings and removal details may vary by model.
- LG Dishwasher Guide to Error CodesLG USA Support · Official general LG dishwasher guidance used for newly installed inlet checks, closed valves, kinked hoses, filter and outlet checks, interruption-related standing water, and service escalation. Error meanings and menus can vary by model; this source is not used to invent a code for the assigned problem.
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