the relay could have been blown in the power outage, ot the board went bac. do u hear the start relay come on at the back of the fridge on the compressor? ITS ATTACHHED TO THE COMPRESSOR and you should hear it click then come on when unplugged and then plugged back in.
If you hear a clicking sound coming from the back of your refrigerator/freezer, then the problem is most likely the compressor,relay and or capacitoris overheating or not getting proper power and will not start.The compressor is the component on your refrigerator that allows your refrigerator to cool. If this component is not working properly your refrigerator will stop cooling. Most of the time the compressor is not the component that has failed.
To checkurcompressor with multi meter:
Disconnect and remove the relay and capacitor from compressor, somelocated next to compressor in a casing.
You wills see 3 prongs coming out of compressor. 1 goes tourstart winding, 1 goes tourrun winding and the center goes tourground.
Placeurmeter connector or prong on the start prong and the other on the ground (center prong) take note of the reading in OHMS for example 5 ohms.
Next place meter prong on run prong and the center ground prongagin. Take note of the reading in OHMS. Example 4 ohms
Next place meter prong on the start prong and the other on the run prong, now take note of the reading example 9 ohms. Now match the total of this ohms test with the total ofurtwo separate test. 9 ohms, if they matchurok give or take 5 percent plus or minus. One more test to make to test of there is a short in compressor attach meter prong to ground prong and rub the other end of meter prong to metal ( scrape the metal clean of paint and test on metal surface not painted surface. If it shows continuity or ohms , u have a short inurcompressor. It should show infinity
TO REPLACE RELAY AND CAPACITOR WITH A HARDSTART KIT YOU CAN USE
A3 in 1 start kit for compressors sizes 1/4 through 1/3 HP. And a 5 in 1 for higher H.P. (BE SURE TO MATCH WITH UR COMPRESSOR MODEL NUMBER AND TYPE) Thekit includes relay, capacitor, andoverload device, pre-wired. Thekit will replace all 3 electrical components on capillary refrigeration systems. For newer systems with a run capacitor use?proper kit. For smaller horsepower compressors useTJ90RCO810
The wire set up is as follows the red wire goes to the right side of compressor prong, the white wire to the left side prong, the black wire to the center prong, and the 2 other black wires go to the power and the ground connection
Lastly you should also checkurTHERMISTORS in the freezer and fridge section for continuity OHMS and for amount of OHMS current being put out. In most models around 13000 ( give or take 150 ohms) ohms is required.