Hey @alz1980. It sounds like you’ve covered most of the basic troubleshooting, as outlined in our Help Center Article here. I would recommend reaching out to our support team so they can determine if the Contact Sensor needs to be replaced under its warranty. You can give our support team a call at one of the numbers availablehere. We’re taking additional steps to protect our team and help reduce the spread of COVID-19, so this has resulted in longer than normal wait times. If you are outside of the US, please read our response to COVID-19here to see how to contact support. 