Bryant thermostat error codes

Bryant DUAL FUEL THERMOSTAT TSTAT error codes

ERROR CODESSolution
ElIf thermostat cannot properly read room temperature, the room temperature display will indicate El and thermostat will enter FREEZE PROTECT mode. When outdoor temperature is below 50°F furnace will operate for sufficient time every half hour to keep home from freezing. The ON time is given by the formula: Minutes ON equals 15 minus (outdoor temperature in °F divided by 4).
E2If the AC line voltage drops below a minimum (brownout) level, all outputs are turned off and the display indicates E2. This condition will remain for 15 seconds after proper line voltage is restored. If the AC line voltage disappears completely, the display will immediately go blank
E3If thermostat cannot properly read outdoor temperature E3 will be displayed in place of room temperature. The thermostat will continue to operate, but will only use furnace in HEAT mode

Bryant Legacy thermostat error codes

ERROR CODESSolution
---The room air sensor reports that the room air temperature is above 150° or below -50°.
E4This means the memory has failed and the thermostat will return to the factory settings. Call your heating and cooling dealer