We haven't had any problems with the
Sadoun PowerTech line of motors. This is ODD. However, go ahead and ship it back to us (follow the return process for RMA) and we will check it out.
Return Policies and Manufacturer Warranty
Also, check the troubleshooting table at the end of this page:
How to install an HH-Mount Motor? Applies to DG240-SM3D22-STABHH100-HH120-Motech-SG2100