04 ram overheating

If you don't suspect failure of the waterpump, it's possible the t'stat is failing. Abntifrz usually blows out, not suck air in simply because of the pressure difference, I doubt air would continue to build in the system without some access to an outside source which would be shown by a leak somewhere on the outside.

Hey guys I have a 3.7 dodge ram that was overheating today. I assume it was a thermostat change it and didn't work. So I forgot the idea of checking for code on the scanner well turn out I had a P0117 ECT temperature sensor circuit Los. Going to replace it tommorow