Need Festool Vac Help!

[Derek Arita]

My CT33 has been actually really strangely. Randomly, I hear the vac powering up and down and up and down, like a sine wave. Anyone experience this before or know what's going on?

[Dave Sabo]

brushes worn out , or close ? 33's are pretty old now.


I'd also check the switch module as they tend to gunk up with dust.

[Richard Coers]

Isn't there a potentiometer on there to make it variable speed? That probably has dust in it, or the internal wiper has just gone bad.

[Ben Schmidt]

Have you checked the bag? I think they do that sometimes when the bag is nearly full. Or the filter could need to be cleaned. Check both of those first!

[Derek Arita]

Have you checked the bag? I think they do that sometimes when the bag is nearly full. Or the filter could need to be cleaned. Check both of those first!

thanks Ben. Will do.