Hey. I have a 2001 eclipse GT, and lately when I stop at a traffic light or jus have my car in idel the heater starts blowing cooler air. I have teken it to the shop two times, the first time they charged me 120 bucks to change the radiator hose. it still did not work. The 2nd time i took it in, they said that eclipse's are very sensitive to how much anti-freeze they need. ( mine showed it was near max) so i took it in, and they flushed the system and refilled it. Well now it gets hot like a normal heater should but still starts blowing cooler air when not in motion. anyone have any ideas what it could be!?

all i can tell you is vaccum lines...thats where i would start.

how do i check the vaccume lines? should i check the thermostat?

thats normal. the heater blows out hotter air when the rpms are up. when you are driving, the rpms are usually around 2500. when you are idle, they are usually 600. the engine isnt working that hard to warm up the air. make sure you have the recirculation on. that will warm it up a little faster but it still probably wont fix the problem

So its normal to blow cold air when at idle? when i let my car warm up, it never is war no matter how long i keep it running, untill i dive it then it blows cold air. I know this is not normal. Maybe a little change in tep is normal. Not a huge change i can feel.

you mean cold as in air conditioner cold, as in, roll down the window on a 10 degree morning cold?

i mean like cold as in a lil warmer then the air out side when its like 25-30 degrees

nah thats not normal. i thought you meant like cooler than the hot air that comes out when the engine is revved up. get the thermostat checked

i had the same problem i replaced the thermostat and now it gets to be like an oven in my car :P

lol then im going to be pissed about replacing some ******* tube thats was not the problem! so another question.... the speaker in my dash is blown.... how do i get to it? is it some kind of clip holdin the plastic piece over the clock?

for the speaker.... look infront of the cubby hole, under the dash. you should see two screws. unscrew these and pull the front part of the dash off(the part that surrounds the radio and HVAC controls). you will need to disconnect the hazard lights. after that is off, you can just pull clock pod off. you might have to pull a little hard but it pops right out. then you will see how to get the speaker out

where is the thermostat housing? I have a GS.

On the back side of the block there is a water pipe coming from the water pump. At the end of the water pipe (drivers side of the engine) there is a small housing where the lower radiator hose connects. The thermostat is inside the housing.