Thermostat shows E06 and becomes unresponsive or reboots when calling for heat.

Safety first: Turn off power at the breaker before repositioning or removing the thermostat.

Steps to address:

• Check mounting location: Ensure the thermostat is not mounted directly above a baseboard heater or in a location where rising hot air directly hits the unit. If it is, relocate the thermostat to a cooler wall location per Mysa’s installation guidelines.
• Inspect for blocked vents: Make sure no paint, dust, or wall coverings are blocking the thermostat’s side or bottom vents. Clean gently with a soft brush or compressed air.
• Verify heater operation: Confirm the heater is not overheating or cycling abnormally, which could raise wall temperature excessively.
• Allow cool-down and reset: Turn power off for 10 minutes to let the thermostat cool, then restore power and monitor. If E06 returns quickly under normal conditions, internal components may be overheating.

Persistent E06 in a proper installation suggests a failing internal power supply or sensor circuit. In that case, replace the thermostat.