Hi Craig, just now saw I had 2 unread posts. These profile comments don't send out an email notification. When it come to starting/stopping sequence, I don't have any immediate recommendations as I'd have to study up on the service manual. Do you have the troubleshooting guide from Coleman?
Link here. There is detailed step by step sequence what's suppose to happen. Relay contacts can get oxidized when not used for a while, especially if there's a lot of moisture in the air. It does not mean they are weak or bad but just need to get active again. If you have an ongoing intermittent problem then yes might need to be replaced. Could also be open or shorting wires, so you could move the wires around and retry the startup process for go/nogo. Good luck, Bill