my first eq

I had a older fosgate power 500 that I had those 3 box fans on and if I startted to push it hard it would also shut down you need to find a way to get more air moving over the amp. I unbolted my rear seat so it could lay down so I was able to have more air flow. I also had no ac so I ran with the windows down as well, when I was really going to beat on the sub. The heat we have is just too much to beat on them with out any air flow. I could be wrong but throwing money at a new amp is not going to help you will still need some airflow to help out  your amp or just play it at lower levels and not ask so much of your amp when it's not as hot here.

I have filters on the work putter so hopefully you can see it because all I get is a red x.

I was using 3 of these http://www.hifisoundconnection.com/Shop/Control/Product/fp/vpid/1331967/vpcsid/0/SFV/30046

If your amp is in an open airspace, and has proper sized power and ground wiring, then you should just try allowing the amp to cool off before turning it up. I do anyways. I wait until I go down the road about 5miles before even turning my system on -in the summer (SC).

Seriously, if it's getting that hot sitting in the car, then the next one will, too. You said it yourself that it's fine when cool.