I recently replaced my timing belt, waterpump, thermostat, cleaned the fins of my radiator and gave it a thorough flush.

My truck runs great but it never warms up. I let it warm up for 10 minutes then drove 13 miles home and let it sit for another 5 and the needle never touched the mark after cold. Before all of this my needle would warm up half way between that mark and halfway. The heater was off the entire time and when i turned it on before i shut it off it wasnt warm at all.

The thermostat is installed correctly and doesnt look like its defective. I dont belive my gauge is broken because it worked a few days ago and my radiator hoses definitely arent as hot as they normally are.

About where should my needle during normal conditions?

Thanks guys