If your SentrySafe won't open, there are a few possible explanations. The most likely explanation is that the combination has been forgotten or lost. If this is the case, you'll need to contact SentrySafe customer service to have the combination reset. It's also possible that the safe has been damaged in some way, preventing it from opening. If this is the case, you'll need to have the safe repaired or replaced by a professional. If you're still having trouble opening your SentrySafe, feel free to contact our customer service team for further assistance. We're always happy to help!