Ok so im having a heater problem obviously.. I read one thread on here that suggested to replace the thermostat and refill with coolant. I did that and i also checked the white cables behind the radio which were all good nothing was loose. However, i let my car run today after replacing the thermostat for about 30 mins and it was still blowing ice cold air out. I have no idea what else is wrong with it. It has about 120,xxx miles and i dont feel like taking it to the shop. Any help would be appreciated.