Brett,
I thinks that's a good idea to have a Miele service dealer check it out.
I doubt there is much in common with the electronics of an older Hoover Dimension 1000. It didn't have an automatic suction control, just a variable speed switch.
The way these work, is that when a reduction in suction is sensed by the pressure sensors, they close a circuit or open it to the motor speed control board.
These sensors are mounted on a separate board, or two. One for motor speed, one for filter and or bag air flow to trigger the performance indicator led lights.
Selecting a manual speed over rides the automatic function.
I also took our kids E-Lux to an authorized service place at first. I don't know what was up, but the counter person saw me eying a Miele and I expressed interest. The next day, one of his techs. called me and told me the cord reel was shot and was over $200 to replace. before I took it in there, the cord was retracting fine, and the led's on the control panel lit up. This was a $400 machine from Lowes.
I declined the repair, and opened it up myself. I immediately discovered a blown fuse on the sumo board that controls the motor. He had all the small vacuum hoses messed up, so I couldn't tell which went where had I even replaced the main pcb board, so I removed all the boards, and wired the motor directly to the main switch.
Caveat Emptor-"buyer beware"! As I was complaining the stores manager, his face just got red.
