Thermostat displays E14 and indicates a sensor calibration or range error; temperature or humidity readings may be locked.

Safety first: No high-voltage work is required.

Steps to troubleshoot:

• 1. Normalize environment: Ensure the thermostat is operating in a normal indoor environment (roughly 50–90°F, 20–80% RH). Allow it to stabilize for 30–60 minutes.
• 2. Reset calibration: In the thermostat settings, reset any user-applied temperature or humidity offsets back to factory defaults.
• 3. Firmware update: Connect to Wi‑Fi and update firmware if an update is available.
• 4. Compare with reference instruments: Use a reliable thermometer and hygrometer near the thermostat to compare readings. If the thermostat remains far off and E14 persists, internal sensors are likely out of spec.
• 5. Replace thermostat: If calibration cannot be restored via software, replace the Bryant smart thermostat.