“…Good *Answer score on the observation sheet checklist (answer "yes" = 1; answer "no" = 0) (Julyasti & Dyahariesti, 2021) *The total score on each indicator is calculated as a percentage (Arikunto, 2016). *The average percentage is categorized with assessment criteria, not good (<60%), good enough (60% -75%), and good: (>75%) (Julyasti & Dyahariesti, 2021). When cleaned, the vaccine refrigerator body only uses a wet cloth without a dry cloth, the vaccine refrigerator condenser is not cleaned with a soft brush, and maintenance recording is not carried out every week and every month.…”