no power to the power board(aqualink).

replaced transformer and system worked for about 10 minutes till i sellected spa fill, that blew the tranformer again so i think i have a short some where but want to buy a new transfor4mer but not at $140/$175 !! need to find a lower cost if poissible so i can finish trouble shooting short without blowing another transformer at $175.
 
What diagnostics have you done on the transformer? It has 120V input and should have 24V AC output.

What voltage are you getting on the output connectors of the two transformers you have?
 
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