Thermostat cycles heating or cooling on and off very frequently (short cycling)

Safety: Only low-voltage and settings changes are needed.

• Adjust cycle settings: In advanced settings, increase the temperature differential or reduce the cycles-per-hour setting to lengthen run times.
• Check location: Ensure the thermostat is not directly in the path of a supply vent or near an exterior door that causes rapid temperature swings.
• Seal wall drafts: Seal the wall opening behind the thermostat to prevent cold or hot air from the wall cavity affecting the sensor.

Note: If short cycling persists, have an HVAC technician evaluate equipment sizing and system performance.