We are sorry to hear about your experience with this portable evaporative air cooler. These units work best in areas with a dry climate with humidity levels below 50-60%. They also require ample cross ventilation along with dry heat for optimal cooling. Please check if the above conditions are met, in order to ascertain why the unit was not cooling. Please do get in touch with our customer support team at 1-800-474-2147, Monday - Friday 8:30 AM - 5:30 PM (EST), or send us an email at usinfo @jmatek. com with the reference code number WMA0611. We look forward to making this right for you. Thank You !