In the past week or so I've noticed my ARB 48qt fridge has been acting up. I had thought it was my aux battery failing so I replaced that. Well, it's not that. New battery is in and fridge still cut out after running for a while tonight. It's blinking 5 times quickly, according to the ARB manual this would be : 5 x flashes every 5 seconds – THERMAL CUT-OUT OF ELECTRONIC UNIT The fridge freezer has stopped operating because the control unit has become too hot. Things to check Check to ensure that there is adequate ventilation around the control unit and the compressor. Check that the fan is operating correctly. The fan must always be running when the compressor is running. The fridge freezer may be operating in extremely high ambient temperatures. For example in a sealed stationary vehicle that is parked in the direct sunlight. Try to improve the ventilation around the fridge freezer or shield it from direct sunlight. The other day when it cut out the windows in the truck were open and it was probably only 80 degrees out. Today it is actually pretty damn hot, maybe 95 and I had the windows up so it was probably over 100 inside the truck. The thing is though, I've never run into this before and I've definitely had the fridge running in the truck, with the windows up in much hotter temps. Fridge and dual battery system have been in the truck for over a year w/o any issues until now. Part of the reason I thought it was the battery is that the fridge would cut out when the truck was parked. As soon as I'd start it up, it would start running. I incorrectly assumed that this meant the battery was on it's way out and that the fridge was starting to kick on because it was being powered by the alternator. But maybe it was starting to run because the truck was moving and air was flowing, cooling things down? Anyone know what might cause the fridge to become more sensitive to in vehicle temps? Anyone else run into this?