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The Pentair Mastertemp 400 is firing and stays lighted. However, water to the spa doesn’t seem to be heating. (It may not be heating the pool either, but is more difficult to determine.) Cleaned filters last weekend. Jets are working fine, but incoming water is nearly the same temp as the spa...

I’ve convinced my husband I will be a happier person if we get a robotic pool cleaner. He travels. I brush. And test water. And add bleach. But that’s another story. I’m ready to order an S300i from Marina, before rebates end, but started thinking about this hellacious heat we’ve been having...