the temperature remains a steady 104.................the spa is not in a filter cycle, but probably once an hour, it turns on for perhaps 30 seconds, then shuts off...................it has two new pumps, a new heating unit. the turning on and off, started a few days ago, previous to that, it was not happening. we just bought the tub from a private owner this summer, replaced all the pvc, the pumps and the heater and just got the thing running...................not sure if the turning on and off is something of concern, just a new behavior................