I have an Utra Quieter diswasher. It's about 7 years old. I found recently the water could not be drained completely, and could not go to "heat dry". Sometimes the machine stuck in the position of "drying" and not moving. If I turn "high temp wash", "high temp rinse" and "hea dry" to "off" position, it drains completely. Is there any problem with the drain senser? How can I avoid the problem? Do I need to change some parts? My phone number is 778-858-0941, and my e-mail address is:davidluo@auic.ca