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This sounds like an overheat issue. I suspect that something has restricted the air flow. Air flow is required for function and to cool the motor. if the air flow is restricted a thermal limiter opens the circuit, rather than have a fire.
Vacuum Cleaners require AIr-Flow. Your machine is not getting any air-flow. The noise you hear is a valve opening up to prevent your machine from overheating and burning out the motor. You probably have an obstruction somewhere in the machine. Dysons are kind of known for that in the vacuum cleaner world. Check all air channels and clean them out. If that fixes the problem you still might have issues that caused it to clog up.
I posted the part second because it takes 24 hours to complete it. Be sure you wash your Washable Pre-filter. It needs to dry for 24 hours. Never put it back in the machine wet.
Once it is completely dry reinstall the pre-filter and your machine should be back to normal operating functions.
brush will not rotate... should I ASSUME it is an upright? IF SO, I assume that it has a drive belt. I guess that you have removed the 3 or 4 screws that hold the belt cover in place and have confirmed that te belt is not broken. Note that excessive hair in the belt drive area can prevent the brush from turning. If you have an air pressure drive system (rare), then hair can clog the air flow to the drive impeller. You provide no information that can guide me to give specific trouble shooting suggestions.....or solutions
The 2 metal pins of the motorized brush are not in contact with the vacuum cleaner. or the Motorized brush is clogged up. You have mentioned that it is cleaned, but still give a thorough inspection. For the metal pins, firmly insert the motorized brush into the air-intake nozzle. This will connect the motorized nozzle to the unit power supply.
Sorry to hear you're having difficulties with your DC07. If the brushbar in your cleaner doesn't seem to be rotating, please check you have the brush control set to 'Carpets', as it won't rotate when set to 'Hard floors', or if the cleaner is standing in the upright position.
If the brush control is set correctly and the brushbar still won't turn, it's probably best if you get in touch with us directly. One of our experts will be happy to run through some troubleshooting over the phone with you, and recommend the best course of action. You can call us free on 08002980298 (UK), or 1866MYDYSON (US).
Can you rotate the brushes manually (grab some of the yellow bristles and rotate the brushes). If they are not jammed, then your air fan drive is clogged or broken. Air must pass through the fan to spin the brushes... so confirm air flow by powering the machine on and feeling for decent air flow. Clear any obstructions that my restrict air flow....
When you move the swwitch to on, you are moving a baffle to allow air flow into the turbine to rotate the brushes. try to move them by hand with the machine off. if you cannot the turbine nees service. if you can check the tank lid is on, foam filter for dirt.
If your brushes are rotated by a black rubber belt, chances are that they belt has stretched out or has been worn and you need to replace that belt, also , check and remove any black rubber residue from the brushes and where the belt loops around. Also check for obstructions thru the hoses restricting air flow.
Problem: Low suction Problem: Clean solution won’t dispense Problem: Brushes/brush indicator won’t rotate during floor cleaning Possible cause Possible solution • Not firmly plugged in • Plug unit in firmly • No voltage In wall plug • Check fuse or breaker • Blown fuse/tripped breaker • Replace fuse/reset breaker Possible cause Possible solution • Recovery tank full/automatic shut off engaged • Remove and empty recovery tank • Blockage In tool on end of hose • Remove tool and clear blockage • Recovery tank lid not on correctly • Make sure lid is on securely • Recovery tank front panel not replaced after stair or upholstery cleaning • Replace recovery tank front panel (page 14)
Before using tool It may be necessary to remove air from the system (“prime the pump”) so the clean solution will flow to the tool. Follow these steps: 1. Attach tool to hose and turn the carpet cleaner ON. 2. Put the tool on a hard surface or against your hand to block off the suction. 3. Wait a few seconds (can take up to 15 seconds). Then squeeze the trigger and begin cleaning.