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    NEW HAYWARD HP 21404T POOL HEATER ERROR CODE LP

    I JUST FINISHED INSTALLING MY NEW POOL HEATER , WHEN I TURNED IT ON IT SEEMED TO BE FINE THE TEMP READ 62 DEGREES AND IT RAN FOR 5 MINUTES THEN AN ERROR CODE CAME UP LP ( LOW PRESSURE ) , AS IT WAS ON THE TEMP NEVER WENT UP AND THEN IT SHUT OFF WITH THE LP CODE ? THIS UNIT IS BRAND NEW...