Originally Posted by kewlguy53403
I had this issue in a previous vehicle. Turns out I had a leak in my coolant and air was getting in the line. Check your coolant. My leak was so small it didn't leave anything on the ground, putting me in a similar position to you pulling my hair out.
I had to add coolant and now have luke cold air not warm at all. I'm trying to find the leak and thinking heater core with faint smell of coolant in the cab...