New Owner Build pool/spa,Henderson,NV, any comments, suggestions, advices are welcome

Pass final inspection , Southwest gas came in to replace with a new bigger gas meter !
However , the Pentair Heater 400K BTU (460736) did not turn on , No power at all, A 1.25A fuse was blown and replace another one by builder , and was blown again !. There is some kind of short circuitry inside the unit. Waiting for Pentair to solve this problem.:(:confused:
Hopefully they will replace with the new one instead of trying to repair a defected one that has never had a chance to turn on !
 
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