Windsor sensor vacuum lights flashing then motor shuts off

it comes up from the back,it is probably plugged or the sensor is dirty

There are (4) main components that affect the height adjustment on your vacuum. They are: Brush roller, Servo Motor, Control board, and Sensor pulley. You have eliminated two of the possibilities already. I would ask you if either of the height adjustment lights on the PC board come on, indicating that the board is attempting to raise or lower the vacuum. I would also have you inspect the Sensor Pulley. That is the yellow pulley that both belts connect to. Do the two sections of the Sensor turn easily without resistance? Do they spring back when released? Are the magnets (small black round magnets on the inside of the Sensor wheels) still in place? That Sensor pulley system tells the PC board whether or not the vacuum needs more or less resistance (to raise or lower the servo motor). Because the Sensor Pulley is completely mechanical (no electrical components); If this Sensor pulley is completely functional, your problem is likely the PC board. I have included some links to the PC board and Sensor pulley for your convenience. Hopefully this helps. 5465 Red Ring Windsor Sensor 86145060 5740 ER Computer Controller Windsor Sensor SR XP 86140160

You need to replace your beater bar more than likely, if the light stays on all the time. If it is flashing there is usually something jamming the brush roller from turning properly.

Your Sensor most likely has an internal heat sensor that is shutting off the motor. Some vacuums install an external heat sensor with a reset button that you must push to re-start the vacuum. If your model does not have an external reset button it is most likely a sensor inside the motor. If it is defective the motor must be replaced to solve the problem. But first make sure the overheating is not being caused by a blockage somewhere or the bag is too full. Air must pass completely through a vacuum starting at the floor where it picks up the dirt through all the canisters, filters, bags, etc. and then is exhausted from the vacuum. Any restrictions or blockage can cause the motor to over heat.
That Vac Guy

check power cable for brakes and cracks, replace if need be..

If you have one of your red lights flashing or on all the time that will indicate where you need to look for your repair. Beater bar light will indicate a brush roll replacement and the bag light indicates a need to empty the bag or look for a clog somewhere in the air flow area of the hose or wand. These machines are designed to shut down if you keep trying to run them with a red light coming on.

You may try a new brush. With these models the light will continuously run to signal it needs the brush replaced.

The sensor is a small hole into the vacuum chamber. It moves the alert system as vacuum inside the unit builds up.

The filtration, built into the bag, is getting filled up and creating a higher vacuum inside the unit, giving a false reading. The only ways to eliminate this are to give the bag a shake to clear some of the dirt out of the filter, try to pick up coarser dirt first or buy generic bags-without the filtration.

The windsor Sensor brush indicator light will come on when:

• Something stuck in the brushroller
• Brushroller is worn and needs replacement
• height is wrong (indicates a problem with height adjustment)
• a bad circut board/sensor

more than likely your brushroller just needs to be replaced, very common.

Drive Motor is gone or the control board.