Hi there! I’m Daniel Otega, here to help you get your Rheem EcoNet app working on your Windows 10 device with WebKit browser. Just to better understand, when you say the app "will not load up on your screen," does that mean the app never opens at all, or does it open but stays on a blank or loading screen? Also, is this the mobile app on a phone or are you accessing EcoNet through a web browser on your Windows PC?

This info will help me guide you precisely. Meanwhile, here are some initial steps to try if you’re using the app on your phone or tablet:

1. Restart your device to clear temporary glitches.
2. Ensure your device’s operating system is updated to the latest version.
3. Check that the Rheem EcoNet app itself is updated to the latest version available in your app store or from the official website.
4. Make sure you have a stable internet connection, preferably on Wi-Fi, since the app relies on that to connect to your water heater.
5. If you have tried all that and it still won’t load, try uninstalling and reinstalling the app.

If you’re accessing EcoNet through a web browser on Windows, please confirm which browser you are using (you mentioned WebKit, which sounds like Safari engine, so is it maybe Microsoft Edge or another browser?), and if you’ve tried another browser like Chrome or Firefox to see if the issue persists.

Let me know some of these details, and we can dig deeper!