I have a Climatemaster TT30 and vertical loop field with flow center. It has been working normally for a year or two, until one time I was using the A/C more than usual when the flow center turned off and for a few hours the TT30 would be "running" but no water was flowing, no cooling of the air, just the fan. I figured something was wrong, so I reset the system, turned the A/C on, and still no water flow and no cooling so I just turned it off. After some more hours, I turned on the A/C and it is working fine, the water is flowing and plenty of cooling. Is there some maximum loop usage that the TT30 keeps track of and will not continue to use the loop field, or what could be going on? The water in wasn't particularly warm, like mid 70s.