Hi Reinhardt,
Welcome to the Heartland Owners Forum.
If you are inside the 1 year warranty, call Heartland Customer Service at 877-262-8032 / 574-262-8030. Have your VIN # ready.
Problems like this often get worse as time goes by. Now's the time to deal with it.
Even if you're out of warranty, ask Heartland what corrective action might be required, and if they would be willing to help with this.