2006 Chrysler 300 3.5 v6 touring

Dis you check all the fluids? If so, if it's full. You may may have an water pump problem.

Never had a problem with overheating. Until a couple weeks ago I took car into shop for tire rods and brakes a rotors and think I had a slow coolant hose leak. They informed me it was housing that was leaking so they put new housing and thermostat on. Got car back 3 days later. Drove 10 min down the road and started to over heat. 20 min ride took 3 hours. Got car back to shop. They had for another week. Told me they don’t know what is going on. They changed the therm 2 more times and drained and filled the coolant also again. But I should call a dealership and have them do a complete coolant system flush. My question is what could they have done to create the over heating issue. Never had a problem ever before. It’s a 2006 Chrysler 300 touring with 122k miles on it. And I keep it well maintenanced.

Suppose to pick it up from that shop today. To take somewhere else and get complete coolant flush done.

Haven’t had my car since feb 27th. They told me could be couple different things but aren’t just gonna throw parts at it to see what it is.