I have a 2000 chevy blazer with 66000 miles. Once the car warms up to around 190-200 degrees, I will turn on the heat, and the heat will blow warm for a minute or two and then it cools off to a luke warm. This only happens in the moring on my way to work. When i leave work it will run fine like there is not problem. I have checked the heater hose, and the left one is hot and and the right one is warm at best. I checked the fluid level in the radiator and they are fine. Could the problem be a thermostat or a clogged heater core?
Nov 18, 2009 at 12:21 AM