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More confusing stuff.
Earlier when I put the clips back on the battery, the temperature inside the fridge compartment dropped to an amazing 6 degrees and I then put the gadget on the freezer and it got down to minus 20..o then put it back into the fridge and the temperature started climbing, up to 12 degrees....I just checked everything again and I found the outside of the cabinet was 41.7 degrees, ambient temperature is 35 degrees..
I think the outside temperature is the killer... anyone have any ideas of all that information ??

I think the gas inside the wall's of the fridge is getting to hot... hence the outside temperature of the cabinet?
Which would also transfer inside ??

Yep, that'd happen.
Fridges are meant to be inside of something where people can live.
In other words if that fridge was inside a building & 'ambient' temperature in that building was 26degrees, then you would have 41.7 - 26.0 = 15.7 difference & therefore the heat (temperature) would be dragged down much quicker and likely trigger the thermostat.
At present you only have a few degrees difference.

The fridge is inside a building Bruce

Bernie, put a cuppla cans of beer inside the fridge. Wait a cuppla hours. Check the thermometer then drink a beer. See if the thermometer agrees with the drinking test.
I'm thinking that there isn't much wrong with your fridge.
Every time you open the door the cold air falls out, then the fridge will cycle and get cold on the inside again.

yes, it's not the air temp but the food temp.

I have bottles of water in the fridge.
And the fridge has only been opened once today.

The thermometer needs to be in the water.

George

It's not that type George... thanks

Bernie, do the beer test. Repeat as often as required.

That doesn't help Dave I'm trying to sell it