The gas fireplace has been fixed. The exhaust motor on the outside wall had seized up. It'd worked for about thirty years with two dozen of those under our ownership.
Alex, owner of A&B Gas Fireplace and Heating Services completed the job in about an hour and a half this morning. Luckily, Alex has a stock of the discontinued blower motors. Additionally, years ago, he had a lot of 100 control boards manufactured after Valour stopped producing them.
We likely will not need to replace what was installed today. Someone else can do that in another thirty years!