I have a MasterTemp 300 heater for our inground 25K gallon SWG pool w/ a raised spa. When in spa mode and heating the spa it seems like the heater will heat the water for about a minute and then we feel cold water coming through the inlets, then it heats the water, feels great when sitting in the spa, and then cold water for a bit etc..It does heat the spa up to desired temp eventually.
Just seems inefficient? Why wouldnt it just heat contiusously to set temperature. Seems like it would heat faster?
PB says that is by design as Pentair does not want continuus heat and cycles the heat for liability reasons. i.e no scalding burns I guess when your in spa and it is heating at full balst for extneded periods?
Does anyone else expereince this or should I be concerned?