Start motor capacitors

[ajlepore]

Hi, I have a bad compressor motor capacitor: 120v, 145-175 mfd, 12amp, will a higher capacitance 243-2worfd replacement work to start the motor? Given that the motor is not the issue. Being of higher capacitance is there risk of damage to the motor? The replacement is ,120v, 22 amp so would need to ensure input circuit is at least 30 amp, correct? I'm on a 20 amp house circuit now.Thanks

 

[jraef]

The higher capacitance will mean a higher inrush charging current and may trip your breaker. it may also increase the torque spike on start up, which may eventually cause harm to mechanical components. Is there a reason why you cannot find the correct cap?


"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington

 

[ajlepore]

Hi and thanks for the reply. This is for a refrigerator compressor, Tecumseh 1/3 hp. I picked up a 3 in 1 combination cap,relay, overload (Supco RCO 410 its specs: 120v,243-292mfd,22amp for 1/4 to 1/3 hp motor. There is a Supco RCO 810, 120v,145-175mfd,12amp for 1/12 to 1/5 hp motors. Was not immediately available. Basically I just want to see if the Compressor motor starts. Concern is trying the higher mfd cap. This is 30 yr old commercial(traulsen) frig.

 

[ajlepore]

Hi Jref, I tried the Supco RCO410 unit and the compressor is still not kicking on, same symptoms. I believe the compressor is to far gone. Thank you again for the response. Happy holidays, Andrew