Looks like I have the same problem as you. Here is what I did, I presume this will help you. I went to Home Depot and they gave me a tel# to call - 1.877.898.1881. You will need to get some numbers from the top of the fan unit - UL, Model, Serial and UPC numbers. I gave these numbers to the tech support person there, and then I was given a toll free number to call for replacement part(s). Hope this works for you, good luck.