S3755 Hoover canister bagless vac no power to head
Replaced the power head drive belt which was relaxed and slipping. After replacement turned on vac and power head motor would not run. Removed belt. Motor still wouldn't run. Thought maybe thermal breaker tripped so unplugged for 1/2 hr. Still won't run. Removed lamp and checked voltage at lamp pins--no voltage. Breaker bad? Where is the thermal breaker? Also is it normal to see open circuit 115 VAC at the receptacle in the speed control handle when the carpet button is pushed? Can't check it under load. Damn them for not putting a manually resettable breaker in the power head. How stupid! Thanks!
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Today I shortened my hose by 4" to get around a tear problem. You can use an Ohm meter to find the right 4 wires. When looking from the top of the canister with the hose heading to your left, the wires should be:
White (furthest connector away from you)
Black - to the switch
With the Red and Blue going to the speed con trol curcuit board.
Very likely it's the cord at the nozzle neck. These cords flex when you vacuum and they often break internally where the cord goes into the neck. Turn the vacuum on and wiggle the cord at the powerhead and see if the powerhead comes on and off. If this happens, then you will have to replace the cord.
On some of the early models, the receptacle in the hose, where it plugs into the top of the wands, will break away from the plastic pins it sits in, and the receptacle will slide back into the handle, which means that it will not plug into the powerhead connection when you connect the hose. You can check this by looking at the end of the hose and observing if the receptacle is sitting flush with the opening it sits in. If it is pushed back, it will not make a complete connection with the powerhead cord that is sitting at the top of the wands.
You should not use this powerhead on any natural or oriental fibre carpet. If you check the brush roller, you will see that the bristle extends out the bottom of the powerhead quite far and that the bristle is very stiff. This is o.k. for synthetic carpets, but will be too aggressive on natural carpet. It will pull material out of the carpet and eventually thin it out. You should use a passive air turbo or a carpet tool for this rug.
As far as the belt is concerned, if it is over a year old, it is due to be replaced. Old belts are stretched and will come off because they are worn out. You might also check to make sure the motor is in place correctly. It is very common that when people want to check the inside of the powerhead, they commonly remove the three screws that secure the motor, thinking that these screws will open the powerhead. If you observe the area between the screws, you will notice that there is a "no screwdriver" warning there. The four screws for the hood are recessed and not as obvious as the motor screws, so this mistake happens quite a bit.