Hello, Based on repairclinic, my furnace blower motor uses 370/440VAC 7.5MFD. However, I just found that my OEM capacitor is in fact 370VAC 5MFD. Question> Can I use the new one to replace the old one? Thank you

I was swapping out my thermostat for a nest and during setup the thermostat told me my Y1 has no power (in hindsight I think I just needed a common wire?). The internet said hvac equipment problems could be the problem and a good litmus test would be twisting my Y1, G and Rc together and see if my AC kicked on. There were some sparks but they eventually stopped. No equipment kicked on. I plugged the wiring back into the base and got a different error, no power on Rc. So I started troubleshooting. None of my breakers were tripped. I went down to the crawl space to investigate and things smelled pretty bad and I could see some smoke coming from the air handler/furnace wiring area. Much more than what I typically associate with a blown fuse. After popping off the access panel I found this... This picture was taken in the box behind the door switch. Everything on the internet told me it was a fuse but I am pretty sure my board does't have one. [url=https://www.justanswer.com/hvac/6xz3b-rheem-rgpj-10ebrjr-gas-furnace-1012-925a-ifc.html]This post [/url]reinforced that as I also have the 1012-925a IFC. I guess I am just confused on what I should replace or where I should go from here. I am not even 100% that the picture I linked is the root of the problem. I think the door switch is the problem but I don't understand why that would burn up before anything else. I also don't understand why there is so much wiring in the box for a simple door switch.