Can you replace a run capacitor with a higher UF?

An electric motor start capacitors can be replaced with a micro-farad or UF equal to or up to 20% higher UF than the original capacitor serving the motor.

Can I replace a capacitor with a lower UF?

There are two answers. It is possible if you have the necessary skills and tools. It is safe. If you put a higher voltage than the maximum you could see your cap explode, that’s the only rating that matters for safety.

Can I replace a run capacitor with a higher voltage?

Replacing a capacitor with something that has a higher voltage rating is always safe. The only problem there is that a capacitor rated for a higher voltage is often physically larger, everything else being equal. Make sure they actually fit in the same space.

What happens if you put too big of a capacitor on a motor?

This is not to imply bigger is better, because a capacitor that is too large can cause energy consumption to rise. In both instances, be it too large or too small, the life of the motor will be shortened due to overheated motor windings.

What happens if I use a higher uF capacitor?

Much the same way, a motor will not run properly with a weak capacitor. This is not to imply bigger is better, because a capacitor that is too large can cause energy consumption to rise. In both instances, be it too large or too small, the life of the motor will be shortened due to overheated motor windings.

What happens if you use a lower rated capacitor?

A wrong size capacitor could cause the compressor to overheat and shorten its life, or not run at its peak efficiency. The lower voltage rating is also a problem. The life of the capacitor will be shortened.

Is there a difference between a start and run capacitor?

The start capacitor creates a current to voltage lag in the separate start windings of the motor. The current builds up slowly, and the armature has an opportunity to begin rotating with the field of current. A run capacitor uses the charge in the dielectric to boost the current which provides power to the motor.

Can I use 50V capacitor instead of 10V?

In general, yes, replacing a capacitor with one of higher voltage rating is fine.