vSMART room thermostat displays a low battery icon or the app reports low battery status.

Steps to resolve low battery:

• Replace batteries: Open the battery compartment on the vSMART room unit and replace all cells with new, high‑quality alkaline batteries of the specified type. Do not mix old and new batteries.
• Clean contacts: If you see white or green corrosion on the contacts, gently clean with a dry cloth or a cotton swab lightly moistened with isopropyl alcohol. Allow to dry fully before inserting new batteries.
• Reduce backlight time: In the thermostat settings, reduce display brightness or backlight timeout to extend battery life.
• Check temperature: Avoid installing the thermostat in very cold locations (e.g., unheated porches) as this reduces battery performance.

If batteries drain within days or weeks, the thermostat may have an internal fault and should be inspected or replaced by a technician.