Thermostat frequently shows low battery warnings (for battery-powered Danfoss smart thermostats or wireless sensors).

Safety first: Battery replacement is low risk. Observe polarity and use only recommended battery types.

Steps to diagnose and fix:

• 1. Use quality batteries: Install fresh, high-quality alkaline or lithium batteries as specified by Danfoss. Avoid rechargeable NiMH unless explicitly supported.
• 2. Improve RF conditions: Reduce distance and obstacles between the thermostat/sensor and its receiver. Reposition devices to improve signal strength.
• 3. Adjust display settings: Lower backlight brightness and timeout in the settings to reduce power draw.
• 4. Firmware update: Update to the latest firmware via the app to correct any known battery drain issues.
• 5. Replace device if persistent: If batteries still drain abnormally fast, the internal power management circuit may be faulty. Replace the thermostat or sensor.

When to call a professional: For large wireless systems with many devices, a controls specialist can optimize placement and configuration.