Float unit. Apparently the float can ride on the inside of the tank, giving false reading on guage. Here's a link to a member's fix, I thought there was another one with picutres a while back but could not find it this morn.
Thanks much for the link....looked all over but couldn't locate it myself.
Apparently the float arm was stuck...as mentioned in the link...rapped on it a couple of times....working now., but will most likely have to remove it and check it out. Thanks again!