I think that Sean explained it quite well. When you boil it all down, the temperature really isnt the limiting factor it is the current draw of the cell. All salt chlrinators see a reduction of chlorine production (current draw) as the temperature decreases. On the flip side, the production naturally increases with all chlorinators as the water temperature increases. Some manufacturers shut their units down at low water temperatures while others like ours dont shut down for low temp. Each manufacturer has their own reason for shutting down or continuing production. This isnt the place to get into that arguement. Sean is right. If you simply push the salt level up closer to the manufacturers recomended top end, you should get the unit to stay up for you.

As far as what to do with the equipment, I am in Canada as well and I do nothing with my cell or power supply except make sure that it is drained. Each manufacturer has their own recomendations so for the sake of your warranty, I would follow that. If there is no recomendation, draining the system and leaving it in place has a lot of good things going for it. As long as the unit itself wont get damaged by freezing, it is usually better to leave well enough alone. Kids wont knock it off the shelf and the dog wont chew on it if you leave it on the pool pad.

Mark Manning
Watermaid Canada
www.watermaid.ca
mark@watermaid.ca