I have a spa with a Pantair Minimax 400 CH heater, 2HP filter pump, 60sq. ft. DE filter and Jandy aqualink controls. I noticed that spa takes a long time to heat up because my heater turns off then back on every few minutes. The temp on the Jandy is set to 100F, but the heater cycles a lot before getting anywhere near this temp.
The heater has 4 LEDs on the front that should all be on when it's heating. Every few minutes, the flames go out and the bottom LED labeld "Heat" turns off. The other 3 LEDs stay lit, the service light is always off, and the 3 LEDs hidden on the back of the controller board are also always lit. After a few minutes the heat LED comes back on and it starts heating again. What could be causing my heater to turn on and off every few minutes? Also the water on the output side is not really that hot. I bought the home with this already in place so I can't compare the performance of the heater to how it was on day 1.
thanks in advance