Mid-cycle stopping usually points to a condition that changes with time.
Start Here
Note elapsed time.
Check airflow and overheating.
Check drain/fill conditions.
Look for door/lid movement.
Consider thermal protectors and overloaded motors.
A useful diagnosis turns a vague complaint into a smaller technical question. Mid-cycle stopping usually points to a condition that changes with time. For appliance starts then stops, concentrate on power, heat, airflow, water and mechanical loads. Use every working function as evidence: if one stage still behaves normally, that fact eliminates causes that would have stopped the appliance earlier in the sequence.
Observe the timing before touching anything. Note what happens immediately after Start, what changes just before the fault, and what remains normal afterward. Lights, relay clicks, water movement, motor or fan sounds, heat, vibration and error codes are useful only when tied to a point in the cycle. A fault that appears instantly is a different problem from one that appears only after the machine warms up or reaches a later stage.
Begin with the cheapest conditions to verify: note elapsed time, then check airflow and overheating. Do not merely glance at them. Compare the actual condition with the manual, correct anything obviously wrong, and retest before moving deeper. Simple installation, maintenance and user-setting problems regularly imitate failed electrical parts.
If those checks pass, move to check drain/fill conditions. Then decide whether look for door/lid movement can be evaluated safely with power isolated. Choose one test that answers one question: blocked or clear, open or closed, free or jammed, intact or electrically open. If a test result would not change your next decision, the test is probably not worth doing.
Avoid assuming software is the cause, immediately cycling power over and over, and ignoring a hot plug or cord. All three skip evidence and can turn a minor fault into an expensive one. After a correction, reassemble guards and connectors, restore normal settings, and reproduce the original operating conditions. A single successful start is not proof; the original symptom must stay gone through the stage that used to fail.
A Safe Step-by-Step Check
Document the exact symptom and pay special attention to note elapsed time.
Remove external causes first; specifically verify check airflow and overheating.
With power isolated where required, inspect check drain/fill conditions and then evaluate look for door/lid movement only if it can be done safely.
Reassemble fully and run a controlled test under the conditions that previously caused the fault.
Common Beginner Mistakes
Assuming software is the cause.
Immediately cycling power over and over.
Ignoring a hot plug or cord.
STOP AND GET HELP: If the next useful test requires exposed live mains, defeating a safety interlock, opening a sealed refrigeration circuit, disturbing gas controls, or entering a microwave high-voltage section, the diagnosis has reached the professional-service boundary.