Report "MY OLD16YRS. RUDD HEAT PUMP WITH THE OLD ROUND FUSES,2 OF THEM AS A MATTER OF FACT, AT FIRST THE BREAKER HAD BEEN THROWN SO ICHANGED THEM OUT TO SEE WHAT WOULD HAPPEN SINCE THEY WERE CHEEP ENOUGH.WELL WHEN I DID THAT THEN THE FAN MOTOR WOULDNT RUN NORMAL SPEED. I CHECKED TO SEE IF IT WAS FREE TURNING AND IT WAS BUT IT STILL MADE A GRINDING NOSIE BUT IT DIDNT SMELL BURNT LIKE SOME MOTORS DO . WHAT DO U THINK"