U35-4 Excavator Aux1Knob error

Megawampum

New member

Equipment
2019 U35-4
May 15, 2025
3
1
3
Washington State
Hello, has anyone dealt with this issue before?

I’m trying to use my thumb but I get an error when I try to switch on Aux.

error is Aux1knob - I guess meaning the rocker switch control for the thumb.

When in tester mode it seems there’s always pressure with the thumb. When I just barely touch the rocker switch in the middle with my finger, it starts spazzing out and opening and closing, part way or all the way, very randomly. Sometimes hitting left or right will do something too but it’s very random.

Not sure where to focus my efforts or if it just makes sense to have the Kubota dealership pick it up.

Thanks in advance for your help.
 

North Idaho Wolfman

Moderator
Staff member
Lifetime Member

Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
33,131
8,525
113
Sandpoint, ID
It sounds like the control is set to motor operation.
Do you have the OPM (operators manual) for the unit?