New Waeco CF50 Temp Reading

Hi folks,

We bought a Waeco CF50 fridge/freezer a couple of weeks ago. We've used it once so far, and noticed that the outside thermostat reading didn't match what the thermometer said the temp was inside. Chalked it down to user error, and moved on.

Tonight we're packing for a 3 day trip and I've had the fridge on since 4pm. Set the thermostat to 3c and after a couple of hours, the outside readout said it was -2c and thermometer read 4c. Packed it with cold food earlier and checked on it just now .... outside readout says -7c and thermometer says +8c. I should add that we hardly ever hear the motor running, other when it is first turned on.

Honestly, I'm a bit miffed. Am I asking too much for the built-in temp reading to actually show the current inside temperature? Or do we have a dud Waeco and need to call up warranty? Or is it indeed user error?

Thanks
Sass.