Hello good night, I have a doubt about a capacitor that brings the air conditioning cards, it is normal that a value of 64nf as soon as its value is printed is 0.1uf, (100nf) I will leave a photo. I think that it is very worn out that they think will I have to change it? I have one similar to the black capacitor in the image, but I don't know if I change it because the one I have is 0.1uf but it also says 120ohm and I don't know what it means with the ohms since the other yellow capacitor doesn't say it . The fault that arises is that the card makes noise when it is energized. This image is illustrative only but is similar to the capacitor that I have only 0.1uf-120ohm

If the measured value gives you next or, 1 uf do not change it, I would look for the relay failing and change it.

Greetings to the forum. If your ed card, like the one in the photo, changes the capacitors of the source, it is very likely that they are devalued and cause an increase in ripple that manifests as buzzing. Review and comment.

The buzzing on an electronic board is usually caused by the winding of coils and / or transformers. With the handle of a screwdriver press the coils or transformers of the plate, when you detect an important variation in the type of hum or even it disappears, that is the coil or transformer that is causing the noise. Cover it with abundant nail polish, let it dry and you will see how the buzzing disappears.