We're sorry you're having trouble with your SentriLock lockbox. Please complete the SentriLock lockbox troubleshooting questionnaire. We'll ask some quick questions to better understand the problem and hopefully provide the steps to resolve the problem, but if not you'll be able to submit a return label request from the questionnaire to have your lockbox replaced.
Additional SentriLock Troubleshooting Resources:
Generation 3 lockboxes:
Generation 4 lockboxes: