Heater not working good

My heater takes forever to warm up and it never gets really warm, its more kinda like kinda cool air. I already replaced thermostat.

 

check by your tranny hump in the floor, under the black coverin the center is the heater core leaking? if so you will find the coolant there if not then idk thats all i know

 

Okay ill look tomorrow I havent tried that yet

 

you may have to replace the core

 

how much is that for a used one

 

i dunno man i never looked at one. theres something else you can change if the heater isnt working but i cant remember what it is. me and a guy were talking about it the other day but i just dunno

 

are you talking about the blen door?

 

yea thats it^ and it wasnt me and a buddy it was me and my psychology teacher :/

 

what and where is that lol?

 

Have you checked the coolant level? It may just be a little low. If it is it may be time for a flush. I just had my flushed, and have to go back and have them put in a little more.