I have a California Air Tools CAT 60040DCADC with an air dryer. This week it tripped the breaker 3 times one day and then the next morning it wouldn’t turn on. The red light in the clear plastic box at the base of the desiccant cartridge was on when I went to look at it and there was a slight buzz (see picture attached). Is it likely the pressure switch that has gone bad? Any other ideas? Thank you!

Sorry, I cannot get the photo to attach.  You may call me if you would like more details.  This is an urgent issue and I would appreciate a reply soon.  Thank you!