That sounds like a coil controller/relay. Normally they time out the pull coil to prevent it from burning out if held on too long continuously. I didn't see one in the schematic, but it could have been a later add or a field add after a problem.
Hold coils are normally not protected, but could be, I suppose. This is the type of Murphy thing I was mentioning earlier.
I'd want to check the problem isnt with the wiring at any of those connectors or that controller/relay before cutting anything.Basically make sure power is getting to the hold coil before replacing it.
Can you send a picture or part number?
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