How do I manually disable LEM mode?
Press and hold the MODE button, press and release the FAN button, press and release the DOWN arrow button, then release the MODE button. The display will show '- - -' followed by 'nO.r' (normal mode) indicating the command to disable LEM mode was sent to the HVAC partner. (Page 35)
From the official Honeywell Wireless Thermostat manual, page 35
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