Thermostat displays E20 and cannot complete Wi‑Fi setup or connect to Amana cloud services

Safety first: No electrical work is required; this is a network issue.

• Step 1 – Check internet: Confirm other devices in the home can access the internet. If not, reboot your modem and router.
• Step 2 – Reboot router and thermostat: Power cycle your router and then power cycle the thermostat by turning off the HVAC breaker for 1–2 minutes.
• Step 3 – Verify Wi‑Fi signal: Ensure the thermostat has a strong Wi‑Fi signal (typically at least 2–3 bars). Move the router or add a Wi‑Fi extender if needed.
• Step 4 – Check router security: Ensure that outbound connections are not blocked by firewall rules and that the router allows standard HTTPS traffic. Disable any overly restrictive parental controls temporarily.
• Step 5 – Retry setup: Use the thermostat or Amana app to repeat the Wi‑Fi and account linking process. If E20 persists, check Amana’s support site for any reported cloud outages.

When to call a professional: For persistent network issues, contact your ISP or Amana support.