The Honeywell RTH9580WF Waiting for Update Message can show up on Honeywell smart t-stats, like the RTH9580WF in this example. These messages, though not always errors, can show up when the t-stat has just come online after installing it, or a power outage. These can also occur if the Wi-Fi network to which the t-stat … Continue reading Honeywell RTH9580WF Waiting for Update Message