Another cause for the F35 and SUD error could be your CCU (control unit). There are components that seem to fail over time and cause the F35 and SUD errors. You can replace those components yourself now...
See f35error.com for more information.
I hope this helps,
Jeff Hartman
"The Neptune Man"
As far as i can find out there is no f35 hold pause cancel for three seconds and let me know if the code resets
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Usually answered in minutes!
the problem seemed to right itself by the time I posted this and went back upstairs it had stopped flashing and the door opened fine..who knows???
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