An air conditioner filter is replaced every 3 months following company guidelines., Predetermined Maintenance, Smart sensors in the school computer lab detect rising temperature in a server and send an alert., Predictive Maintenance, A homeowner changes worn extension cords before they cause sparks., Preventive Maintenance, During routine cleaning, a janitor finds a damaged outlet cover and reports it for later replacement., Corrective Maintenance, Your electric fan starts making unusual noise and shaking., Condition-based Maintenance.

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