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Too high of voltage, bad motor the capacitor is running , or power surge

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13y ago

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Can you change a 440 volt 12.5 uF start capacitor with a 370 volt 12.5uF run capacitor?

There are two ways to read this: you have a burned-out run capacitor on your motor and a good start capacitor in your parts box, and you have a burned-out start capacitor and a good run capacitor. If the run capacitor's bad and you want to put the higher-voltage start cap in its place, the answer is yes. This is called derating, and the only thing it does for you is increases the lifespan of the capacitor because you're not working it as hard as it can take. If the start capacitor's bad, don't do this--they used a 440-volt capacitor in there for a reason.


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bad roads, potholes, and being hard on your brakes. Eventually, they will "go bad" due to normal wear and tear.


How to wire a split capacitor motor?

Your two hot wires go to the load side of your contractor and the two brown wires go to your capacitor


Will a bad capacitor cause your fan and compressor not to work?

Yes, but usually one side of the capacitor will completely go out. Either the fan or compressor will not work. First look at the capacitor. Usually they swell and the cylinder shape becomes rounded on the bottom or top. If you know how to work a meter, disconnect the leads on the capacitor and check for continuity (ohms). Put one lead on the Common and the other or Herm then move it to fan. Look for a rise and fall in ohms. If its bad, continuity will be lost on either side. Depends on what you are trying to repair, fan or compressor.


Can a run capacitor start a blower motor running it slow and causing it to overheat or is it a bad motor?

Yes, a bad capacitor causes blower motor to become slow or stop. Since bad or shortcapacitor will make the surge of current and tripping of circuit breaker.


What fails on AC electric motors?

Bad bearings, shorted or open windings and perhaps a bad starting capacitor.