Owner's Manual
Page 47
... AND FEATURES, cont. 6. The screen will flash an ERR message and shut your HVAC system has malfunctioned, the system will have no longer respond to thermostat controls and the Auto cut off - automatically turns the system off if the temperature rises above 95o F (35o C) or drops below 40o F (4o C). (...off will no effect.) 47 Auto cut off until the batteries are replaced with new AA alkaline batteries. You must Reset and reprogram the thermostat after replacing the batteries if the thermostat has entered Error mode. 7. indicates an unexpected battery problem. Error mode -
... AND FEATURES, cont. 6. The screen will flash an ERR message and shut your HVAC system has malfunctioned, the system will have no longer respond to thermostat controls and the Auto cut off - automatically turns the system off if the temperature rises above 95o F (35o C) or drops below 40o F (4o C). (...off will no effect.) 47 Auto cut off until the batteries are replaced with new AA alkaline batteries. You must Reset and reprogram the thermostat after replacing the batteries if the thermostat has entered Error mode. 7. indicates an unexpected battery problem. Error mode -