Fridge Flue Temperature

You need more than 2 hrs to bring the refer temps down lower than 54 degrees. I let mine run over night to get to 38 degrees. If it works on electric your cooling unit should be fine. Where exactly are you measuring 400 degrees? Is it on the flue itself with the sht metal and insulation around the flue remove or on the outside of the sht metal surrounding the flue. I would take a reading about 4 ins above the above the flame on the flue itself and post that reading. Some of the members on here have the ARP system and they monitor that temp continually with their system. I forget at what temp the system shuts the refer down but I sure someone will post that temp.