Hard to answer 100%, but I've taken care of any failures the best I can. If your unit has been running fine, there should not be anything to worry about. Semiconductor failures generally occur within the first few uses. Like most appliances, if you make it past a month, you should be good for a long time.@Pipes, do those of us with previously purchased units ( in my case specifically the PS) have to worry about this failure occurring?
I've being replacing the FETs with NTD4806NG FETs.