I installed a window type 18000 BTU air conditioner that runs on 220v. I also installed the 220 outlet. The outlet has power, according to the current meter the power cord to the unit has power and power is making it into the unit, but it won't turn on. I have tried both a 15 amp and 30 amp breaker but neither helps. The unit is rated for 15 amps. Help! I am so frustrated!!
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Actually you should buy and install an AC wall outlet. An AC uses more amperage than most any other appliance due to the fact it has 2 motors the compressor and the blower / fan motor. An AC wall plug has larger terminals so that the plug does not ever heat. Changing the cord to a different and smaller terminal plug is a bad choice due to the danger of overheating the wall outlet terminals. You can buy the AC horizontal terminal outlets at any hardware store. Unless you have a 110V AC unit you will also have to run a 220V #10 Romex (3 wire) with ground to the outlet to be in code.. An AC unit 1 HP (10,000) BTU or larger requires over 15 Amps for start up. Those that are 20,000 BTU or larger obviously require more than 15 amps as a power source.
If you have or know someone how has a multi meter just test that you have 220 volts at the outlet. Thats about the only way to tell. The fan will run if you only have 120v at the outlet, just not the compressor. so it will not cool. If you only 120v at the outlet it could be just a fuse or breaker problem. If it's a new outlet then it could be wiring wrong also.
Hope this help
Some units are 120 volt and others are 220v
Units up to about 18,000 btu are usually 120 and over that they are often 220...
The pug for the 120 will look like a normal light cord plug and the 220 plug will have the two blades going sideways instead of up and down...
Also for the larger units you will need a dedicated circuit for them as they take too much power to run on a circuit with anything else...