2008 chrysler town and country replaced water pump and thermostat. its not over heating but sometumes it blows out cool air and sometimes it needs water.

Sounds like it needs to be purged from air pockets in the cooling system.

leaking head gasket

Look real good around the housing of the thermostat and squeeze your top radiator house and check for leaks, I found I had put the wrong thermostat in my Chrysler 2007 van. It started blowing out my freeze plugs front and back and it also ruind my water pump and fan motor by the time I found out that advance Auto parts got me. Good luck I did mine on my back and it was fun. Hehe

I am still having problems with my fans I can jump them from the fan motor with the relay in it or out of it and the key on and they work. Also work when I turn my air on. Is this again going back to my motor and could a wrong thermostat cause my problems with the freeze plugs and waterpump.I think advance should pay for it.

Yes and look for gray milky stuff around your heads or in your oil. For head gasket problems that man could have a good point too good luck brother from a veteran who cares