Thermostat shows room temperature that is clearly inaccurate compared to other thermometers.

Safety first: Minimal electrical risk if you only adjust settings and location. Disconnect power if you remove the thermostat from the wall.

Steps to diagnose and fix:

• 1. Compare with reference: Place a reliable digital thermometer near the thermostat and compare readings after 30 minutes.
• 2. Adjust calibration: Many Danfoss smart thermostats allow a temperature offset. In the settings, apply a small positive or negative offset to match the reference thermometer.
• 3. Evaluate mounting location: Avoid external walls, direct sunlight, or locations above concealed pipes. Relocate the thermostat if the environment is not representative.
• 4. Check for heat sources: Ensure no high-load devices or transformers are installed in the same wall box, which can warm the thermostat.
• 5. Replace thermostat if sensor faulty: If large offsets are required or readings are unstable, the internal sensor may be defective. Replace the thermostat.

When to call a professional: For relocation requiring new wiring, use a qualified electrician.