I have a Lennox system,, its a 2002. I think the selinoid is starting to go. It works then it does not. But when its not the fan nor the compressor will kick on. I took off the door to the unit and pushed the contacts together manually and it took of running. I also turned it off and sprayed some contact cleaner as I saw some crud in the track the contacts run in. I have a couple of questions, just above the solenoid is what looks like a second capacitor and its leaking acid? like the stuff that comes off of a battery corrosion. I am posting photos of both the "capacitor" unit and the solenoid. My question is I have a johnstone near by and my father has an account [he is a HVAC contractor] But hes 74 so I can only go so far with him on this. Since its a Lennox would I be able to get a solenoid at a place like Jhonstone or would I have to go through lennox? What is that black cylinder that is leaking? Thanks for any help.