the tailwind app says my controller is 'offline' but the light on it is solid blue.

Diagnosis

The solid blue LED on the Tailwind iQ3 indicates that the device is powered on and has successfully completed its internal boot sequence. However, the "Offline" status in the app signifies a break in the "handshake" between the iQ3 hardware and the Tailwind cloud servers. This typically happens when the device maintains a local connection to your router (keeping the light blue) but has lost its WAN (Wide Area Network) gateway or is being blocked by a firewall change. This specific state often occurs after a power surge or a router firmware update that assigns a new IP address to the device, causing a conflict in the DHCP table. Because the iQ3 uses a 2.4GHz radio, it is also highly susceptible to "channel crowding" or signal attenuation if you have recently added new electronic devices or metal shelving between the garage door motor and the Wi-Fi router. To confirm this is a network issue and not a hardware failure, check if other 2.4GHz smart devices in your garage are also experiencing latency or disconnects.

How to Fix It

To restore the connection, you must perform a coordinated power cycle to clear the cache and force a new IP assignment.

1. Physically unplug the Tailwind iQ3 controller from the power outlet. If it is wired into the opener, toggle the breaker or disconnect the power lead.
2. Locate your Wi-Fi router and unplug the power cable from the back of the unit. Leave it unplugged for exactly 60 seconds to ensure the capacitors fully discharge.
3. Plug the router back in and wait 3 to 5 minutes. Do not proceed until your smartphones and laptops are successfully browsing the web via Wi-Fi.
4. Plug the Tailwind iQ3 back into power. Watch the LED; it will flash during the boot process and should eventually return to a solid blue.
5. Open the Tailwind app and force-close it (swipe up/away) to refresh the status. The "Offline" banner should disappear within 30 seconds of the device booting.

If That Didn't Work

• Perform a Network Reset: If the device remains offline, you need to re-provision the Wi-Fi credentials. Press and hold the reset button on the iQ3 for 10 seconds until the LED flashes. Open the app, go to "Settings," select "Change Wi-Fi," and re-enter your credentials. Ensure you are connecting to a 2.4GHz band, as the iQ3 cannot authenticate on 5GHz networks.
• Assign a Static IP: Log into your router's admin panel (usually 192.168.1.1 or 192.168.0.1). Find the Tailwind device in the "Connected Devices" list and select "Reserve IP" or "Static IP." This prevents the router from changing the device's address during a lease renewal, which is the primary cause of intermittent "Offline" errors.
• Install a Wi-Fi Extender: If your router is more than 30 feet from the garage or separated by thick masonry/brick walls, the signal strength (RSSI) may be too low to maintain a cloud heartbeat. Install a 2.4GHz Wi-Fi extender halfway between the router and the garage. Once the signal improves, the iQ3 will maintain a stable connection without dropping.
• Check DNS Settings: If the device is connected to the router but cannot reach the Tailwind servers, change your router's DNS settings to Google Public DNS (8.8.8.8 and 8.8.4.4). Some ISP-provided DNS servers struggle with the specific ports used by smart home cloud controllers.

Heads Up

• Avoid 5GHz SSID Merging: If your router uses "Smart Connect" (merging 2.4GHz and 5GHz into one name), the iQ3 may struggle to connect. For maximum stability, create a separate SSID specifically for 2.4GHz devices.
• Clear Obstructions: Keep the iQ3 controller away from large metal objects or high-voltage power lines in the garage, as these create electromagnetic interference (EMI) that disrupts the Wi-Fi signal.
• Firmware Updates: When the device comes back online, check the app for any pending firmware updates. Updating the iQ3 often resolves known connectivity bugs and improves reconnection logic after power outages.