Thanks for the recommendation. I checked the water temp and it is in the 80’s. This is obviously a strange problem. There’s power to the unit at all times, but it’s like the control board keeps changing. Perhaps a bad relay switch?
The system was installed in 2007 but the AquaLogic board is a replacement board. The original board was fried by lightning last year. The new one was purchased used. It seemed to work fine until recently, but I know things can change.
The pump stays on for varying lengths of time. Sometimes a few minutes and others close to an hour.
The clock does appear to be keeping accurate time.