The WM4200HWA manual states that a cycle cannot be started remotely after the door has been opened. Prepare the load, close the door, and enable Remote Start again locally; repeatedly reconnecting Wi-Fi is not the first answer to this documented door-state restriction.
Models covered
WM4200HWA, WM4200H*A/WM4100H*A manual MFL71728905, Remote Start. Does not establish compatibility with every newer ThinQ remote-control setting.
Wait for motion to stop and the door or lid to unlock. Water may be hot. Isolate power and follow the exact manual before any user filter maintenance. Never open a filter against a full drum, force a lock or bypass an interlock.
Compare the behavior
Match the documented control, cycle or feature before interpreting the result. The comparison below keeps normal model behavior separate from an unresolved fault.
| Observed state | Interpretation / next step |
|---|---|
| Door opened after arming | Re-enable Remote Start locally after closing. |
| Armed but offline | Investigate network connection. |
| Door/lock code at local start | Resolve the closure state before app setup. |
Model-specific checks
Separate connection from permission to start
An appliance can still appear in ThinQ while not being armed for a remote cycle. Ask whether the door was opened to add an item after Remote Start was enabled. That sequence is more informative than signal strength when the problem begins immediately after opening the door.
Re-arm at the appliance
After checking the load and closing the door, power on and use the model’s Remote Start control. The exact-family manual specifies holding it for three seconds, then starting from ThinQ. Do not use an app command to try to defeat an open or obstructed door.
Use the failure stage to choose the next path
If local arming succeeds but the appliance is offline, network troubleshooting is relevant. If the controls cannot arm Remote Start with the door correctly closed, note any CL or door code and resolve that state first. If the app confirms a start but the washer reports a fault, record the fault instead of deleting and re-adding the appliance immediately.
What to record next
A connected appliance and an appliance authorized for remote starting are different states. Showing that distinction prevents needless account resets while preserving the door safety design.
When to stop and get help
Only carry out maintenance permitted in your model’s manual. For service, note the full model number and suffix, displayed code, selected cycle and what happened during the checks. Leave internal wiring, gas components, pumps and safety devices to a qualified professional. A symptom alone does not identify a failed part.
Sources & references
- Opening door prevents remote start; hold Remote Start three seconds to arm. Smart Functions: Remote Start
- LG WM4200H*A/WM4100H*A manual, manufacturer-authored mirror
- LG exact-family Remote Start manual mirror
Based on publicly available manuals, manufacturer support and the references listed here. We have not inspected or tested your appliance. Follow the instructions for your exact model; a guide cannot replace an in-person diagnosis.