Got a call from a tech that I know and trust. He tells me that he has a start capacitor that is "leaking" a white powdery subsatnce. He claims this is because the start cap is mounted on its side.
He said Lennox had this problem when they were mounting start caps upside down. He went on to say he has never found this substance "wet" but he has seen cases where the dried powder appeared to have been drop that formed a spatter pattern on surfaces below the cap and then dried.
I don't doubt what he is saying, but for all these years I was under the impression start caps were dry. The most common failure I have seen is the internal plates and paper expanded out the top.
Any ideas about this would be appreciated.