Dingfeng Capacitor---How to check a start capacitor

Nov 13,2017
Dingfeng Capacitor---How to check a start capacitor

Start capacitors are very common in electric appliance for motor starting. For example ,when the motor on your washing machine makes a humming noise,but won't start ,then you need to check your start capacitor.You can check by a simply test to tell you if your start capacitor is completely dead or still can be alive by doing something.
1.Remove the start capacitor. 
The easiest and most convenient way to discharge the capacitor is to attach the terminals of a low wattage 120v light bulb (about 20 watts) to the capacitor terminals. This will safely discharge the electricity which may still be stored into it.
  • Be very careful that you do not short the terminals by connecting one to the other, until after the capacitor has been discharged. Doing so could injure or kill you. Use extreme caution when discharging the capacitor before proceeding.
2.Examine the capacitor for bulging or fluid. 
Signs that the top of the capacitor are bulging out slightly, as if expanding, is a sign that the capacitor might be dead. Likewise, check and look for any dark fluid that appear on the top of the capacitor
  • If you see either of these, it's still a good idea to run the check with a voltmeter, since it only takes a few seconds.
3.Use an analog or digital volt meter.
Both work in essentially the same way and are both appropriate for the job. Set the meter to 1k ohms to begin the test.
4.Touch the two terminals with your ohms meter test leads. 
The basic check involves touching the test leads twice and comparing the reaction. Touch the test leads to the terminals and then reverse them.
  • The needle in your meter should swing to 0 ohms and swing back to infinity on an analog meter, and should display open line every time that you reverse on a digital meter. If it does, you've got a live capacitor and your problems are elsewhere. If there is no difference the capacitor is dead. 

5.Check for capacitance, if the capacitor is alive. 

If you have a multimeter ,you can use the capacitance setting to perform a quick check .If the number is relatively close to the number listed on the capacitor ,it is in good shape .

As the top three capacitor manufacturers in Wengling, we have engaged in producing capacitor for over 28 years and we are trying to be better.We believe one day Dingfeng Capacitor will exist in every corner of the world by means of its reliable quality and good reputation. By the way, Dingfeng sincerely welcome all the friend to visit our company and hopes to have a good communication and double-win partnership with all of you cause Dingfeng capacitor is always on the way to be better! Your views are the driving forces of Dingfeng! I hereby on behalf of all the members of Dingfeng, thank all of you for the long-term supporting and concerning of our growth.

ac motor running capacitor: http://www.dfcapacitor.com/products2062600/Ac-motor-running-capacitor.htm

fan capacitor: http://www.dfcapacitor.com/products2062602/Fan-capacitor.htm

air conditioner capacitor:http://www.dfcapacitor.com/products2062601/Air-condition-capacitor.htm

Lighting capacitor:http://www.dfcapacitor.com/products2062606/

Lighting-capacitor.htmStarting capacitor:http://www.dfcapacitor.com/products2062603/Motor-starting-capacitor.htm

power capacitor: http://www.dfcapacitor.com/products2062604/power-capacitor.htm

If you have any question about our company or dingfeng capacitor, pls contact us:

Foreign trade : Katrina

Mobile: +86 15067446433

Tel: +86-574-88034090

Fax: +86-574-87111961

E-mail: sale05@dfcapacitor.com

QQ: 1298975481

Skype: 15067446433