99 Grand Caravan Blower intermitent

Winter has finally arrived here in Michigan and now the car issues begin. First snow yesterday and today my wife tells me the blower for the heater works at an idle, but not when accellerating. It's a new one to me. Initially she called to say it didn't work, but later said it did at an idle. I was hoping for a fuse, but now I'm wondering if there is something that has to do with vaccuum like when the selector didn't work in my Safari? As always, any help would be greatly appreciated! I know a happy wife is a dream, but this would help. :uhoh:

No vacuum on Chrysler Corp minivans HVAC systems. Its all electrical. I would suspect a loose or corroded connection. Start with the relay in the fuse panel. Swap it with an identical relay.