After a few minuets, the motor speed drops from 1100 to 0. The motor is not over heated and there are no clogs in the system. After I manually increase the speed, its works again for a few minutes and the problem repeats.
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1st make sure battery is fully charged.
Next, wash the filter, just follow the instructions in the manual.
If the filter is clogged the motor will try to run but then cut out to protect the motor from damage.
Vacuum cleaners have electric motors in them that require proper airflow to pass over them to keep them cool. Many vacuum cleaners have a thermal (heat) sensitive shut off mechanism built in. This mechanism should prevent the burn out of the motor. If you run a vacuum too long with a clogged hose or clogged filters (especially bagless vacuums) or clogged bags, that is essentially choking the vacuum for air and not allowing it to breath properly. This will cause it to overheat and shut down. Most of the big box store purchased vacuums have very thin wires in the motor windings and can only do this a few times before the motor completely fails. If your vacuum has been shutting down, then cooling off and restarting after about 30 to 45 minutes, then shutting down after only a few minutes of use, your machine is probably clogged up or the filters are compacted.
Hi, I would say the motor is overhesting and there is a heat sensor in the motor that shuts it off w3hen its labouring. Check your hose for a clog . If that does not help check the filter aorund the motor to see if it is clean. Hope this helps. Chris
It's possible the thermal reset is defective. It shuts the motor off if it gets hot. Remove the bag door and take the bag off, remove both filters and then turn the vacuum on, just leave it sit there with the motor running. This eliminates the bag or filters causing any airflow resistance. If it still shuts off after a few minutes it's likely the thermal reset is bad. Some vacuums have an external thermal reset button which can be replaced if necessary but on your model it is built into the motor and you must replace the motor. If the motor runs fine put the bag and the filter under the bag back in - (make sure the filter is clean and not restricting airflow) put the bag cover on then turn it on again. If it overheats and shuts off then you may have a clog on there somewhere restricting the airflow. If so check the power nozzle area, the hose coming from the power nozzle, the extension hose and wands for clogs or restrictions.
you are over heating the motor ...that is caused by low airflow ... make sure the bag is not full, hoses not clogged and secondary filters (sometimes on the output side) are not clogged ... make sure there is lots of air going thru the motor .. the motor cant run long without air to cool it ... it has a thermal switch that trips when it gets too hot .. the thermal switch resets itself when the motor has cooled ...
hi this sound like a familiar problem of the motor o/heating due to lack of ventilation ? check the filters ok? remove the cover concealing the roller brush/beater and check for clogging at the underneath and housing clear it out properly easier to remove/lift out roller ? also clear out the clear bucket dust collector and most important the cone that fits into this canister has a cylindrical honeycombed/small holes(looks like hundreds? ) use a small pointed impliment to poke out all!!these holes as these are relative to vacuum within cylinder so if not clear ? motor no vent and result is no/poor vac and o/heat then thermo switch kicks in and shuts down till motor cools hope this helps best wishes from uk
Checked and found that motor is definitely overheating for unknown reason. Since power unit is still under warranty, solution was to contact local service company for NuTone power unit and have them come out and fix/replace it free of charge.
Probably not the motor protector, its function is shut off the motor if it overheats. Most likely you have a clog or partial clog in the inlet down by the brush roll, or it is in the hose. But if the motor is running, and suction is low, with no clogs, then maybe the motor is running at a slower speed and will have to be replaced.