For those of you with more knowledge than me about such things. I have a small fan motor that quit. Fractional hp fan used to inflate greenhouse plastic layers. Once started, it runs 24/7/365. I'd like to try a new start capacitor to see if that will get it running again. It's a CBB61, 1.2uF, 370v. I found a somewhat similar looking one on Amazon for ceiling fans, but it is 4uF. Would that make any difference ? Thanks
If you put two In series you will have 2ufd and will probably be close enough. Measure current and see if it is within it's rated value. If so all is good. Still it's always best to keep to original value whenever possible.
You might want to check and see if your fan has a start switch. Often they will fail and then the motor is never in the start function as it is a small centrifugal switch which can be dirty.
So happens I replaced my first capacitor in a ceiling fan today. Not feeling proud but embarrassed about all the fans I threw away over the years.
Amazon has 'em: https://www.amazon.com/dp/B08764Z2WY/?tag=survivalmonke-20 Six bux for two. 450V is an improvement over 370v
You can test them on your tongue to see if their sill good, if your tongue explodes, it's still good!
AC start capacitor's are not DC condensers They do bleed ac through the winding, but they can hold a punch for a very small time. I do remember leaving the odd condenser on the bench
I have swapped capacitor sizes in an induction motor. But I was trying to lower start/run amps and increase power factor. Maybe try any approximately 1uf capacitor with a voltage rating of at least 370v or higher.
Exactly right! My throw away Harbor Freight Gator generator failed and after troubleshooting replaced the capacitor with a new higher voltage rating. Working better than ever....
