Samsung RS20CCSV1/XEU starrtup problem

Hi all first post hoping someone can advise.

Samsung RS20CCSV1/XEU side by side fridge freezer 10 yrs old
We had a couple of power trips in the house caused by a external pond pump,following morning noticed the freezer had just about defrosted and the compressor was hot. The compressor starts for 4 seconds then the relay /protector clicks it off for a couple of mins and so on.Pressing both power freeze buttons does not show any error codes.

I have tested the compressor with a multimeter and the readings add up to what they should and it is not shorting to earth.
The capacitor readings go up then down when pins reversed which I believe is correct.
Changed the relay ptc and overload protector.
Temp sensors seem to work as I fill the fridge freezer with hot air (hair dryer) and turn off on and temp display goes up.
To be sure I was going to wire up the compressor directly to the mains to test but the youtube vid with Jamaican? guy bridging the start and run posts with a screwdriver looked a tad scary.
Any Ideas would be appreciated as strapped for cash at the mo 😥
cheers
Rich