Spa and Pentair Mastertemp 400 installed brand new 3 years ago. Oct 2017
Normally, heater is set to around 97oF, and would heat to this temp, and then stop, and then reignite 20-30mins later to heat back to set temp.
In the last 3 months, i noticed spa is cooler, and increased temp setting to 104oF (which is max unit will allow - on digital screen).
So now, it heats to 104, although still not as hot as it use to, and then stops, and then reignite 20-30mins later to heat back to set temp -...
Pentair Mastertemp 400 - water temperature in spa not reaching what it use to
Normally, heater is set to around 97oF, and would heat to this temp, and then stop, and then reignite 20-30mins later to heat back to set temp.
In the last 3 months, i noticed spa is cooler, and increased temp setting to 104oF (which is max unit will allow - on digital screen).
So now, it heats to 104, although still not as hot as it use to, and then stops, and then reignite 20-30mins later to heat back to set temp -...
Pentair Mastertemp 400 - water temperature in spa not reaching what it use to
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