Carrier APU shutting down. Need help!

My carrier comfort pro turns on and works great. All features work. Then stops and shuts down and on the display the temp light is lit up. Doesn't appear 2 be hot. Also checked fuses and the temp sensor and air intake. All seems ok. Was working fine and only thing I did was rinse out the ac condenser find with a water hose

 

Also forgot 2 add. When it quits on the APU control is says check APU engine

 

Ya checked around everywhere and don't see anything. The main little control box with the digital lights in the actually APU box had came lose and I had 2 rig it up and zip tie it a few days ago. Has a couple bumps you can tell from rattling around when it came lose. But what gets me is I can start it 20 times in a row and it starts everytime and works for 2 mins roughly. At home now and nearest place is 250 miles and leaving back out for 3 weeks on wed. And will have no time once out. Fml

 

was serviced less than 100 hours ago. Oil is still full and no leaks.

 

So took it into a carrier dealer today. $185 ao not to bad. Was the coolant overheat temp sensor that went bad. Just FYI. Thanks 4 the input 2 all. Be safe