Physical Controls & Display — Mysa for In-Floor Heating

Front Controls

• Up arrow — Function: Increase temperature setpoint
• Down arrow — Function: Decrease temperature setpoint

Side GFCI Controls

The GFCI test and reset buttons are located on the side of the thermostat.

• Test button — Function: Tests the GFCI protection circuit
• Reset button — Function: Resets after a GFCI trip
• Trip indicator light — Function: Illuminates when GFCI has tripped

Display

The display shows the current temperature based on your selected mode:

• Ambient mode: Shows room temperature (5–30°C)
• Floor mode: Shows floor surface temperature (up to 40°C)

During pairing, the display shows a Bluetooth symbol to indicate pairing mode is active.

Error Codes on Display

Your Mysa for In-Floor Heating displays error codes when issues are detected:

• H2 — Meaning: Open heating circuit — no heater load detected — Action Required: Check heater connections and wiring
• H3 — Meaning: GFCI trip — ground fault detected — Action Required: Press Reset button; if error persists, check for wiring issues
• I3 — Meaning: Floor sensor issue — Action Required: Check sensor connection; sensor resistance should be 5K–40K Ohms

Testing the GFCI Monthly

Test your GFCI protection monthly to ensure proper operation:

1. Verify the trip indicator light is off (if on, press Reset)
2. Turn the heater to maximum temperature and wait 10 minutes
3. Press the Test button
4. Verify the trip indicator illuminates
5. Wait 5–10 minutes to confirm the floor heater cools
6. Press the Reset button to end the test

Tip Set a monthly reminder to test your GFCI. Regular testing ensures the safety circuit is functioning properly.

Manual Operation Without Wi-Fi

If your Mysa loses Wi-Fi connection, you can still control the temperature manually using the up and down arrows on the front of the thermostat.

Firmware Updates

Mysa for In-Floor Heating receives firmware updates over-the-air (OTA) through the Mysa app. The app will notify you when an update is available and guide you through the installation process.

Note Firmware version details are pending verification. Check back for updates.

Need Help?

Contact our support team at support@getmysa.com