I first purchased my Civic in Jan of 2015. My first car had terrible over heating problems so I decided to get rid of it for my civic. Turns out, my Civic has the SAME problem. I decided to take it down to Daytona for a road trip when I bought it and halfway there I saw it was all the way on the H. I stopped at a rest stop (thankfully) and this really nice guy put water in it and told me I had absolutely no coolant. I thought, okay that's fine, I'm an idiot for not checking, it should be fixed. Well, when I got to Daytona I took it to my Uncles house (he's been a mechanic for years) and after a little research we decided that I needed to replace my thermostat and my radiator. we also took out my condenser. but low and behold, that has not fixed the problem. I've had diagnostics run on a lot of things and everything has come back working just fine.
WHAT ELSE COULD BE THE PROBLEM!?
I put coolant/water in it every single day before I drive it and it's been fine for a while, and there are no leaks, my oil is not milky, and my exhaust is fine. PLEASE HELP! I want to keep my car, thank you!