It's an old Sears garage door opener. The schematic shows a 50 ufd start capacitor. What's in there now is 43-52 ufd. What I've found locall to replace it is 53-64 ufd. Will that work?
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6 years ago
Motor start capacitor
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6 years ago
Probably... But the wrong capacitor value may make the motor not spin up at all, or go in reverse instead.
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6 years ago
YES Those values are not critical for that application.
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6 years ago
Right. A start capacitor has a minimum value at which it work work. The ones that are critical are the run capacitors. And even then,
10-20% will usually work, 100% might, but the motor will run hot.-- Jeff-1.0 wa6fwi http://www.foxsmercantile.com
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6 years ago
You might check with an HVAC supply place if you haven't already. A lot of them carry Supco aftermarket start capactors, or have something they can cross to Supco. Supco has one that is pretty close to what you have now, and a few that might fit - all cylindrical, diameter x height:
CS43-56X110 43-56 uF, 110-125 V 1- 7/16 x 2-3/4 CS53-70X330 53-70 uF, 330 V 1-13/16 x 3-3/8 CS56-72X110 56-72 uF, 110-125 V 1- 7/16 x 2-3/4
I am not affiliated with Supco. I put one of their dual start capacitors (fan and compressor) in the outside A/C unit at my old house and it worked OK.
Matt Roberds