Within weeks of my purchase, the product failed. When switched to the 'auto' position, the motor cycles continuously. I contacted Sisco and they have been uncooperative. They are essentially denying that their product has failed. They want me to ship the product to them at my expense; they will then decide if it is broken. They agreed to send me an email with their return terms, but they have not sent those terms to me. Their one-year warranty is an empty promise!