When I turn on my fan it only works in the HIGH position. The LO and the 3 or so intermitten positions do not seem to work. The blower only comes on in the HIGH position. It doesnt matter if I have it on A/C or Heat/Vent or whatever. It is very annoying because not only is HIGH heat very loud but it also gets to warm and I have to shut it off. Then i get too cold and have to turn it back on again. Please help me with suggestions on how to fix this. THANK YOU