Thermostat shows Wi‑Fi connected but cannot be controlled from the Johnson Controls mobile app intermittently.

Safety: No electrical work on HVAC is required.

• Step 1 – Check signal strength: On the thermostat, view Wi‑Fi signal strength. If low, move the router closer or add a Wi‑Fi extender.
• Step 2 – Stabilize router settings: Disable aggressive band steering or automatic channel changes if they cause frequent disconnects. Ensure the 2.4 GHz band is enabled if required.
• Step 3 – Assign static IP: Reserve a static IP for the thermostat in your router’s DHCP settings to avoid address conflicts.
• Step 4 – Update firmware: Use the app or service tool to update the thermostat to the latest Johnson Controls firmware.
• Step 5 – Re‑pair device: Remove the thermostat from the app and re‑add it, following the pairing instructions carefully.