temp gauge

i guys i toke my cluster off the change the decals to white but didn't end up doing them had to put it back together because im moving when i put it back on my temp gauge goes from cold to over hot as soon as i switch the key to start it can anyone tell if they had this problem and how they fixed it the water is full i check it everyday i changed thermostat but still does it But before i toke it off it worked

The pin that holds the needle has moved. Did you have the needle off ?

nah mate i didnt touch the needle but i pulled it back off when i move the plug it goes down as soon as i let it go goes back to the H

Are you sure you reinstalled all the screws on the back of the membrane board correctly? Could it be a ground issue?

mate i didnt even take it apart i was going to change it then i was told i had to move so i put the cluster back in and put plugs back on now when i move the plug it goes back down