Just replaced 1.5hp flotec pump with 2.0 hp, but now can't get relay to start pump. It clicks, and my meter shows I'm getting 120 v at the pump, but pump won't come on. Checked my 20 year old starter relay and noticed it was only rated for 1 hp at 120v ( although it's worked great with the 1.5 hp pump). I'm guessing I need a new relay rated for 2 hp at 120v, but don't want to spend the money if this isn't the most probable problem. Any suggestions? Pump comes on when I plug extension cord direct to it. Thanks