Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to test a refrigerator ptc relay [title] Expose the back of the fridge to get access to the motor. [step] Make sure the appliance is unplugged. [title] Find the fridge compressor and remove the plastic case that houses the starting circuitry.

Ending1: [title] Place the end of the insert tube or ratchet to a particular tube and immediately slide the appliance over the tube. [title] Open the unit to see if the power goes through the unit and plunge the unit into its own system. Ending2: [step] Either memorize the wiring or take a few pictures just to be sure you know how to put it all back together when you're done. There's usually a diagram somewhere as well-make sure you can follow it and identify parts. Ending3: [step] Remove the oil filter, the drive deep reservoir, pan, base tank, and the motor. Leave the other components, as the figure on the electricity meter indicates, that are responsible for the heating, cooling, and painting. Ending4: [title] Using a special variety of tool, cut through a thin membrane on the back of the fridge unit and reveal a compressor's rear hose. [step] Insert the plug of the compressor into the compressed hose, where the valves are located.

Answer format: ending1/ending2/ending3/ending4