The heat in my '01 Blazer has suddenly stopped working. I've read a lot of the posts on here, and think it's probably the heater core that's clogged up. I'll get to that tomorrow, when I can drive. Right now the freezing rain coats my windshield after 1 mile of driving and I have to stop and scrape it off again :/

So until tomorrow when I can flush the heater core, I wanted to know if there is possibly a fuse that's blown on my heater system.

I opened the fuse box on the driver's side under the hood, and couldn't find any fuse labeled heat, heater, or anything like that. Is there one that I missed, or is there one elsewhere? I'm asking in hopes that there's just a simple thing I can fix that'll get me to work today.

 

Are you saying that the fan quit blowing, or that no heat is being produced? A blown fuse won't prevent heat, but a clogged heater core will. If the fan quit working it may be a fuse. There is a fuse panel in the dashboard on the driver's side. Open your driver side door and look at the end of the dashboard. The fuses are behind the removable cover you see there. A manual for your Blazer may be helpful:

http://www.extendedgmwarranty.com/ow...let-Blazer.pdf

 

It's not the fan. The A/C works fine, and the A/C turns off when I turn the heater on. With the heater on, I just get ambient air blowing around. I'm going to have to flush the coolant entirely as well, so it doesn't clog again. My coolant looks like muddy water. Naturally, it's 20 degrees out, so playing with water outside is going to be a lot of fun.