So yeah...it's starting to get close to freezing here in MD at when I leave for work at 6am in dress clothes for work, I'm freezing my ass off.
I switch tstats for Summer (180*) and Winter (195*), and I just switched Friday to my Winter one. I did the usual purge of the air (opening the valve on the tstat housing while the car was warm and circulating coolant. The car now has a visibly higher temperature, per the stock gauge, but the air blows super cold (outside temp, I'm assuming). This isthe same for if the A/C is on or off. Also, it blows SUPER cold if I turn the A/C on cold. I don't have coolant in my interior, so I don't think my heater core is cracked or leaking. Do they just go bad and stop heating? Could it be clogged with crap from 11+ years? Is there a way to clean it out without ripping my dash apart? Is there a write-up for replacing a heater core?
Thanks.
