Direct answer
Intermittent routines usually fail at the trigger, one action, device reachability or timing condition. The activity history shows where the chain stopped.
What this covers
- The observed symptom matches this record
- Customer-accessible settings, connections and external components
- Diagnosis before reset, deletion or component replacement
What it does not cover
- ×A model-specific error code with a different documented meaning
- ×Internal electrical, battery-cell, gas, refrigeration or sealed-component repair
- ×A guarantee that every model exposes the same control label
Capture the exact symptom
ReversibleReview routine activity at the missed time and test the trigger and each action separately.
Run the smallest isolation test
ReversibleRemove overlapping time/location conditions and replace ambiguous duplicate device names.
Correct only the proven cause
ReversibleSplit long routines or add only supported delays after identifying the unreliable action.
Verify before changing anything else
ReversibleTrigger the routine manually and automatically at least three times.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Exact questions
Common follow-ups
What should I check before resetting anything?+
Review routine activity at the missed time and test the trigger and each action separately.
What is the safest isolation test?+
Remove overlapping time/location conditions and replace ambiguous duplicate device names.
When should I stop troubleshooting?+
Do not use consumer routines as the sole control for safety-critical locks, heat, medical or security functions.
Answer for the exact device and software version shown above.