strange dock circulator issue
I have 3 separate circulators positioned around my large L shaped dock all controlled by a thermostat timer. Have run like this for many years and never an issue. Something strange yesterday and I don't understand how its even possible. They have not been running because I do not turn on till I get ice. I now have ice and turned them on. The breaker tripped and when I went to investigate 2 of the 3 were encased in a block of ice. How is that possible when they are in water about 5 feet deep? The ice bound the propellors which I assume tripped the breaker. Lifted them out, broke up the ice and they worked again. I have never seen ice form on the bottom before.
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