Need help identifying replacement run capacitor.
We've had a local HVAC/Plumbing company twice inspect our gas furnace as part of a "complimentary" service we had after they did some plumbing work. On both occasions, each technician has stated the blower capacitor is pretty weak and near failure. Their price for replacement was stupid high, and I knew I could do this myself with some research.
First off, to determine if they're trying to BS us into some unneeded replacement, do capacitors really "weaken"? Or do they just fail? I wasn't present at either visit, just my wife, but I assumed they determined it was operating outside of some acceptable capacitance range.
Secondly, assuming we should replace, I need help pinning down a value to order the correct replacement part. I've attached a photo of the run capacitor. From what I understand, I can get a 440v capacitor instead of the 370v I have now without issue. Need to match 50/60hz, and obviously size to fit in the housing. What I'm getting confused on is the 5uf capacitance rating. I'm seeing all sorts of values for replacement parts, none which simply read 5uf. Most are something like 35uf + 5uf, or 40/5 mfd.
Can you guys clarify exactly what I'm reading here, and what value(s) would work as a suitable replacement?
Thanks for the help!