overheating??? on 1998 Chrysler Concorde

cant figure this one out. opened radiator(resivor) as there is no radiator cap on radiator to check fluid. put cap back on now overheats. cracked bleeder screw loose even took out and only thing comes out is steam no fluid. everything worked fine before i checked fluid though. cant believe it is the thermostat just happened to go bad at the same time. ANY IDEAS????

Asked by for the 1998 Chrysler Concorde
1 answer
coolant s low. air means low coolant level. fill to proper level and bleed system with engine off. will draw air into system with it running

Roy