Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to diagnose refrigerator problems [title] Check that the power cord is plugged in all the way. [step] Pull out the refrigerator if needed and press the plug firmly into the outlet. Check your appliance's electrical cord for damage.

Ending1: If there is any damage on the cord, you should take immediate action. [substeps] Older appliances might not connect to the refrigerator using power cords, and others might overheat easily. Ending2: If you are stuck, don't force the plug into the outlet. Simply remove the plug and replace the power cord. Ending3: [title] Detach the dryer wire from the top of the dryer. [step] A utility wire should have arrived with your dryer earlier than a regular wire. Ending4: Any exposed wire, kinks or cuts in the cord might make the appliance malfunction. If this is the case, do not use the cord and contact a repairman.

Answer format: ending1/ending2/ending3/ending4