Temp gauge reading high 1998 c1500

[Markus Escamilla]

So i had a leaking lower hose and I decided i should replace everything since the cooling system has 265k miles. I replaced the upper and lower hose, the reservoir and reservoir hose, the thermostat, the coolant temp sensor, and the temp sender unit. First issue was the coolant temp sensor which caused a cel so i exchanged it. Next my temp started reading high and as i drove, the gauge went to like 235f or 240f so I stopped and put my infrared thermometer to the thermostat housing and it read 198f. The old temp sender used to be fine even though it had a bare wire. I exchanged the sender and the new one read the same temp, so what do i do now?

[Brian Lindsey]

you might still have air in the system, turn your heater valves on,  and start squeezing hoses to try and force the air out.