Home / Device types / Smart Thermostat

Smart Thermostat diagnostics

Test what the browser can see. Know when it cannot.

Separate browser, account and network symptoms from HVAC wiring and control-system faults that require model-specific or professional diagnosis.

Run these first

Relevant live checks

Browser Online Status TestCheck the browser online state, available connection hints, and a short round trip to DeviceOK.

Browser Network Timing Variation CheckRun repeated HTTP round trips to DeviceOK and show timing variation between samples.

Public IP Address CheckSee the public-facing IP address DeviceOK receives for this web request.

First diagnostic sequence

Do the high-signal checks before risky changes

1
Check whether the thermostat itself has power
2
Follow the exact manufacturer wiring and compatibility guide
3
Use a qualified HVAC professional for wiring uncertainty

What DeviceOK/browser can help check

Confirm general internet access
Help test web-account/app reachability from this device

What this browser page cannot prove

Measure HVAC control voltages
Verify furnace or heat-pump wiring
Determine safe equipment compatibility from browser data alone