Thermostat shows large swings in humidity readings or humidity control is erratic.

Safety: No high‑voltage work is required.

• Check location: Avoid installing the thermostat near bathrooms, kitchens, or exterior doors where humidity changes rapidly.
• Ventilation patterns: Ensure exhaust fans and HRV/ERV systems are not blowing directly on the thermostat.
• Compare with hygrometer: Use a separate humidity meter to verify readings.
• Adjust humidity control: In settings, widen the humidity differential or disable aggressive dehumidification if it causes frequent cycling.
• Replace if sensor is unstable: If readings jump wildly without environmental cause, the internal sensor may be failing.