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For those who need to cool a small space, the best air conditioner is often a window air conditioning unit. And to keep your window unit in excellent working order, it’s best to know how to do some AC repairs. If you need to replace the power cord of your window AC unit, follow these steps: Turn off and unplug the unit, then remove the front cover to access the cord connection. Loosen the screws, remove the old cord, and insert the new one through the strain relief. Strip the wire ends and connect the new cord to the terminals, matching the colors. Tighten the screws and replace the cover. Plug in the AC unit and turn it on to test the new cord. If you’re uncertain about any steps, seek assistance from a professional or the manufacturer. If the AC won’t turn on at all, you may have another problem to solve.
And for those looking for further information on central AC units, we have another article that discusses when to replace a heat pump with an air conditioner. Plus, if your AC causes lights to dim, you’re having a whole ‘nother problem.
For more A/C-related questions, check out our info content covering leaving your A/C on when you’re not home, how to understand air conditioner symbols, and learning what E1 means on your A/C.
Basic knowledge of which wire goes to which terminal is all that’s needed to install your own power cord. If you are looking for more information on HVAC units, here’s an article that covers what causes Freon leaks in air conditioners.
Keep the unit in an upright position throughout the repair process as best you can.
Check where the wire goes through the sheet metal frame. Make sure the rubber grommet/grip-tight is still installed, so the sheet metal doesn’t cut the cord.
What is an LCDI power cord?
This acronym stands for Leakage Current Detection Interruption. This type of cord detects a breakage in the hot wire (black) and uses detectors to prevent the unit from causing fires.
What is a strain relief clamp?
A strain relief clamp is a small plastic brace that attaches to the power cord to hold it and take pressure off it.
What gauge wire do I need for my window AC power cord?
To know what size you’ll need, check the amperage of your unit. For example, if it is 20 amps, you’ll likely need 12-gauge wire. And if it is a 30-amp unit, you’ll need 10-gauge wire.
STAT: Experts recommend letting an air conditioner sit flat for at least 2 hours after repairs to allow the oil in the compressor to settle. (source)