From my experience on about 15 different trains, there is always something broken. Maintenance on creature comfort items is about non-existant. Problems range from lighting doesn't work, electric outlets with no power, swivel seats (Superliner lounge car) with jammed swivel mechanism, footrest falling apart, etc. etc.
So if you were moved because they had to take your original car out of inventory, be glad for that. If they had continued to run that car, the trip would surely have been disapointing.
Fond (?) memory: on the Empire Builder Chigago to Glacier, the roomette AC was blowing some, but not very much air. We inquired if there might be an adjustment, but the attendant said, "Sorry, it is what it is."
During the day, we moved to the lounge, but for the night it was hot in the roomette. I studied the AC grill plate and realized it was on backwards, pointing the air towards the corridor rather than towards the beds. I went to turn it around, (Always take a screwdriver with you on Amtrak) but then found much more air came out of the duct with it off. So I left it off until morninng, and then I put it back.
Near the Glacer station, the attendant came around to make sure we were ready to get off, and with a smile he said, "I know what you did. You got all the air and everyone else cooked." That made me sad for the others, but it illustrates Amtrak's creature comfort maintenance.