Hi there! I see you're getting a message about "Major number of API failures" and that remote access to your Sensi is temporarily unavailable. I'd love to help you get this sorted out.

Just to clarify:
- Are you currently able to control your thermostat locally (like from the device itself or while on your home Wi-Fi), or is all access affected?
- Have you tried restarting your router or the thermostat device yet?
- Also, is your Sensi app up to date on your Windows WebKit browser, or are you using a dedicated app on another device too?

These details will help me guide you more precisely. In general, API failures often indicate the app is having trouble communicating with Sensi’s servers, which can be due to network issues or a temporary service outage.

Here’s a good starting plan:
1. Power cycle your network equipment and thermostat: turn off your Wi-Fi router/modem, wait 30 seconds, and turn them back on. Then do the same with your thermostat (power it off for a few seconds, then power it back on).
2. Ensure your thermostat firmware and app both have the latest updates installed. Updating can fix many communication problems.
3. Check your internet connection on the device running the Sensi app/browser to confirm it is stable and unrestricted.
4. Force close your Sensi app or browser tab, then reopen and try again.
5. Visit Sensi's official server status page to see if there’s a known outage or ongoing maintenance.

If those don’t help, a factory reset on the thermostat itself sometimes resolves persistent issues but should be a last resort as it clears all settings and network info. You can find the reset in the thermostat's Menu > About > Factory Reset.

If you want, I can guide you through each step on your Windows device so it’s easier. Would you like to start with the networking reset and verify your app version first?

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