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Remote switch is on • Adjust remote switch to desired position. Thermostat Fan switch is in On position • Normal operation. HVAC system is running to satisfy heating or cooling requirements. • Normal operation. Ventilation limit is set to 100% ventilation limit. • Set ventilation limit to 60%. The control may not be able to meet the recommended ventilation requirements. • Increase ventilation airflow through fresh air duct and adjust settings. Low ventilation air flow. • See Problem: Not enough