I have a 2009 camry. The heat works as long as the vehicle is in park and it don't over heat, but as soon as you start to drive the vehicle, the heat gets cold and the car starts to over heat. I have replaced the thermostat and water pump. Any help would be appreciated

 

THe only thing I can think of that would help is to check your coolant level, I know that can affect your heating while driving but If thats not it then I would suggest taking it to a mechanic shop to be checked out.

 

Engine model, 4 or 6 cylinder?

 

Radiator plugged most likely . Try fluhing it with a very good flush adivative .

 

Any update?