Temperature gauge problem

[surge s14]

My car has recently started over heating but my gauge doesn’t read more then half way. Can anyone help me out? if i cant get this fixed soon im gonna have to run where ever i go :eek3d:

[DrtyRat]

factory gauges suck...they tell u when the engine is cold/warm/melting....get an aftermarket one like I just did b/c I was having the same prob and I wanted to be able to monitor it correctly