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