Temperature gauge showing half way when I turn the ignition on, cold engine

[Fodda172]

Hi all I need your help!. My temperature gauge is reading half way when I turn the ignition on, the engine is cold! Things I’ve tried.

New genuine temperature sensor, I’ve tried 3 different sets of dials & still the same. Thought it mite be an earth fault so ive spliced into the loom & added a permanent earth onto the gearbox & still the same. I’m running out of ideas 🤣 anyone had this before??