What will cause my radiator to boil. The temperature gauge stays in the middle. on 2001 Dodge Intrepid

I changed the thermostat.

by in Seattle, WA on February 20, 2014
2 answers 2 comments
ANSWER by on February 21, 2014
Finish filling the cooling system, air in cooling system.
COMMENT by on February 21, 2014
I did fill it.
ANSWER by on February 21, 2014
poss bad radiator cap
COMMENT by on February 21, 2014
We check all the hoses and we can't see where it is leaking from. I will check into cap. Thanks