Jayco Sterling Fridge

Are you running it on gas or 240v, they usually struggle on 240v, more efficient on gas.
Most 3 way fridges as installed by caravan builders will struggle in warm weather.
They are rarely installed correctly to provide correct airflow at the rear, nor are they properly sealed to the internal of the van.
There should be a free flow of air in at the bottom of the fridge and out at the top, no obstructions and the air must be ducted so it flows over the fins at the rear of the fridge, not just past/behind them. That same hot air should also be prevented from accessing the space around the sides and top of the fridge or exiting into the van interior.
Many owners also fit a couple of computer fans to aid the airflow in hot weather.
There are also models specifically built for Oz conditions, not sure these days but they used to have a T (for tropical) in the model number.

I am a refrigeration mechanic and i can say that the door seals play a MAJOR factor in efficiency. Check the seals for a tight fit, and make sure they are clean including the mating surface on the fridge body. The bottom corner of upright refrigerators are a common bad spot for door seals to fail as that is where gravity pushes most blood,softdrinks,and any other food, and it causes warpage of the seal. If the seals are good then airflow is the next thing to look at. Also, your 240v supply may have been interrupted and these 3way fridges take ages to get down to temperature, so patience is a must. Last thing is that the 240/12v element is cactus, in which case it will need replacing. On the odd occasion the actual sealed refrigeration system has failed, in which case it might mean a new refrigerator, all the best.

Check the model of the fridge. It is found inside near the door. If it has a T after the model no. It should work to about 38`c. If not they often die after 33`c.
Try shielding the outside vents from the sun do not restrict the air flow above the vents. This may help. I fitted some computer fans to expel the hot air.

The fridge label inside the door will have a separate box which will be called 'climate class' . It should have a 'T' stamped in it. It won't be in the model number.
Depending on the age of the fridge I'm pretty sure that once the dometics get into the larger sizes (mine's a 150L) they are all 'T' climate class regardless.

In 2009 I was in the Sydney Goulburn area at this time of the year and it was a constant 38-40 degrees outside. Mine was freezing stuff on a setting of 4! On 240V too.It works really well.......maybe it's faulty. :)

Ours did the same in Darwin 2 years ago there is a jayco agent who was in the park at the time he replaced the element all good he also said to put a surge protecter on the plug .On another forum I got told of for suggesting that

Common with fridges that aren't T rated.

If it is cooling on gas then the problem more than likely will be the 240v element is on the way out and will need replacing.

Hi Clint
The 240v element will either be working or burnt out Easy way to check is run it on 240v for an hour or so the see if the boiler @the back is very hot , if not you have THREE possabilities:

[1]It is not getting power, check the plug is in & switched "oN"
[2]Rotate the thermostat back a forth it may be stuck
[3] the element has burnt out.
You should ALWAYS post the model number as there may be other possabilities
Peter