Hi. I'm Joe and I will be glad to help you out.
This sounds like you have a bad dual run capacitor. If you remove the service panel, you should see something that looks like a silver soda can with wires coming out of the top. Normally when they go bad, they will become dome shaped on the end with the wires, but sometimes they will look normal and still be bad.
To figure out what kind you need, you will need to remove the bracket holding it and look for a Uf rating on the side. You should see something like 35/5Uf. You can get these at any local hvac or electrical supply house. Or I can find you one online if you would like.
Replacing these is simply wire for wire, however you will have 3 different terminals marked C, F and HERM. Just note what wires go to which terminal and you will be good to go.
Please just reply back if you have any questions. Thanks
ok give me a few mins to llok at it