We need a little more info to be able to help. The model of your smoker and if you're using a pid to control it would help.The outlet for the cabinet on the back of the smoke gen is protected by the fuse on the back of the smoke gen so check that first.An easy test is to plug the cabinet directly into the wall socket, if it doesn't work there then either the inline fuse or the over temp sensor is bad,both are located on the back wall of the cabinet. A multi meter is a big help when trouble shooting.