Mysa Smart Thermostat Not Controlling Baseboard Heater

Problem Description

Your Mysa Smart Thermostat for Electric Baseboard is not controlling your heater, not connecting to WiFi, or showing incorrect temperature readings.

Common Causes

• Incorrect wiring for your heater type
• WiFi connection lost
• Voltage mismatch (120V vs 240V)
• Temperature sensor placement issue
• Heater relay stuck

Solutions

1. Verify Voltage Match

• Check your heater voltage (120V or 240V)
• Mysa comes in different models for each voltage
• Using wrong voltage will damage thermostat
• Verify at breaker panel if unsure

2. Check Wiring

• Line wires connect to LINE terminals
• Load wires connect to LOAD terminals
• Wire colors vary by installation
• Ensure connections are tight

3. Reconnect WiFi

1. Press and hold the button for 5 seconds
2. Mysa will enter setup mode
3. Open Mysa app and follow reconnection steps
4. Select your 2.4GHz network

4. Test Heater Directly

1. Turn breaker off
2. Bypass thermostat by connecting line to load directly
3. Turn breaker on briefly to test if heater works
4. If heater works, issue is thermostat or wiring
5. Turn off breaker and reconnect thermostat

5. Calibrate Temperature

1. Place thermometer near Mysa
2. Compare readings after 15 minutes
3. Adjust offset in app if needed
4. Keep Mysa away from drafts and sunlight

6. Factory Reset

1. Press and hold button for 15 seconds
2. Display will show reset confirmation
3. Set up again in Mysa app

When to Contact Support

Contact Mysa Support if you smell burning, see sparks, the display does not work, or you need help determining wiring.