Thermostat shows E241 indicating loss of connection to Lennox cloud services; local control works but app access fails.

Safety warning: No HVAC power work is needed; this is a network-level issue.

• 1. Verify internet access:
  • Confirm other devices can browse the web.
  • If not, troubleshoot the ISP connection first.
• 2. Check router settings:
  • Disable overly strict firewall or parental controls temporarily.
  • Ensure the thermostat is allowed internet access and not blocked by MAC filtering.
• 3. Sync time and date:
  • Ensure the thermostat time and date are correct, or set to automatic if available.
• 4. Wait and retry:
  • If Lennox cloud services are down, the error may clear on its own once service is restored.