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Max-E-Therm Heater question

14 years ago

Quick question for you experts out there...I have a Pentair Max-E-Therm heater (400 BTU) that I have been enjoying all winter. We even heated our pool for a few days, what a blast! It worked great. However, I've noticed that lately the spa heats fairly quickly to 98 degrees and then just stops there and holds, even when the temp is set to 101 or higher. I know early in the winter I had it above 100 at some point. I took a look at the manual and noticed there is a way to change the max set point using a switch on an interior board. Is this my problem? Is there some way for that limit to have moved without me knowing, because I know it's been higher than 98 at some point?

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