Warranties are frequently voided by factors unrelated to the defect itself, including unapproved repairs, parameter changes, inconsistent maintenance practices, poor inspection records, or damage attributed to extreme weather events. Without a detailed, time-stamped inspection history, manufacturers can argue that a failure resulted from misuse, inadequate maintenance, or external conditions. Most denials occur not because a defect didn’t exist, but because operators cannot prove when it occurred or under what conditions.