AC or climate control problems

[joel price]

It's really hot and the last couple of days I have had a problem with the AC on my 87 300D--AC blows cold but intermittently the blower with stop working. The blower motor was replaced last year. I can push the climate control buttons and eventually the blower will begin to work again and may not stop for some time then again it may only run for a few minutes before it stops again. I have checked the fuses and they are okay(fuse block and 25Amp outside the fuse block) Could this be the selector control panel of buttons that is failing?
thanks Joel /Atl