- Before replacing, verify incoming power and check for a blown line filter/fuse if the platform uses one.
- Inspect connectors for heat discoloration—repair harness side or the new board can fail early.
- If “won’t drain,” ohm-test the pump and check for blockages first; boards are often blamed incorrectly.
- If “won’t spin,” confirm lid lock/door lock feedback—control won’t command spin without it.
- Check the pressure hose for pinholes/soap gunk—bad level sensing mimics board failure.
- After replacement, run the manufacturer calibration/auto-test if available (VMW platforms often require it).
- If the old board shows burn marks, check the driven load (pump/valve) for shorts before powering up.
- Use ESD handling—static damage can create “new board intermittent” headaches.
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