How To Test A Refrigerator Relay. Then locate the cover plate at the bottom rear of the refrigerator and remove it with a screwdriver. Put one probe on the prong thats furthest to the left and the other probe on the prong on the right to take a resistance reading.
Unplug the unit from the power source. A faulty start relay is the most probable reason why a refrigerator compressor starts and stops. Then locate the cover plate at the bottom rear of the refrigerator and remove it with a screwdriver.
How to test the start relay.
Put one probe on the prong thats furthest to the left and the other probe on the prong on the right to take a resistance reading. To test the ptc relay in your refrigerator unplug the fridge and remove the lower back panel so you can access the relay which will look like a small black box with 2 or 3 wires running into it. To do this do a physical check on the relay to understand if its working or not. You can attempt to check the run capacitor for electrical failure on your own using a multimeter to test the refrigerator start relay.
