Hi there! I’m sorry to hear that the Hive app on your iPhone isn't connecting to the valves or thermostat. That can be really frustrating. Let’s try to figure this out together.

First, could you let me know if there are any error messages you're seeing when you try to connect, or is it just not responding? Additionally, have you recently updated your app or iOS?

In the meantime, here are some common troubleshooting steps to start with:

1. Check Your Internet Connection: Ensure your iPhone is connected to a stable Wi-Fi network. Sometimes a weak connection can cause issues.

2. Force Close and Reopen the App: To do this, swipe up from the bottom of the screen (or double-click the home button if your iPhone has one) and swipe the Hive app off the screen.

3. Restart Your iPhone: This can often resolve connectivity issues. Just hold the power button and slide to power off, then turn it back on.

4. Update the Hive App: Make sure your Hive app is up-to-date by checking the App Store for any available updates.

5. Reboot Your Hive Hub: Unplug the hub from the power source, wait for about 10 seconds, and then plug it back in. Once the lights stabilize, check the app again.

6. Check the Hub Location: Ensure the hub is placed in a central location, ideally away from obstructions, as this can affect connectivity to your devices.

Let me know how these steps go. If you’re still having trouble, we can dig further into the issue!