When door opens the buld blinks and it stops till we reset trip switch after sometime

Our frigidaire 2 door refrigerator stops working intermittent. we got to reset the trip switch on the main board. The reset also works only after giving it some time. we had technician replacecd starter kit but it seems it wasnt the case. Today noticed when i open the door the bulb blink 3-4 times then refrigerator went off. I noticed there is no electricity in wall plate also. But after 30 mins resetting the trip switch brings power to wall plate and refrigerator as well. I’m wondering is it something problem electric line to the wall plate or Refrigerator? The technician didn’t give any warranty and now he says he will replace thermostat and give it a try. i’m skeptical at this point for spending any more service which is not promising.

Could you have any advice on this.

Thanks in advance.