Bubblehead thanks for the information. The more I read these responses and the more people that I talk to it actually just sounds like the water is just too cold and our unit just can't keep up. Makes sense I guess. I believe we actually have a 50 and a 30 amp Shore Power. I have a space heater running now....but it's just not doing much. Husband will be home shortly and is going to stop by Lowes and pick up a different kind of heater. Sooooo much to learn on this boat. But it's fun....and challenging. Thank goodness for warmer temps next week. WingNWing......would love to chat with you more about this since you are right here. I think you have my number..if not let me know and I can send it to you through gmail. THANKS!!!!!!!