High pitched sound - Hoover F7431-900 SteamVac Vacuum

The DC50 has a known design fault that causes a loud hissing. It is a blocked cyclone. You can find the "how to" and photos here: Dyson DC50 Blocked and Hissing Not Picking Up

make sure the filters are pushed it all the way and the pipe work is clear

sounds like the bearings or brushes in the motor are bad.

check belt and blockage

the impeller fan is broken.needs to be replaced

something is clogged somewhere start from bottom and foolow suction path all the way through. wht kind of vacuum?

High pitched noise is not good. It may indicate that a bearing is going out. I would not use Kirby as it may lead to burned motor.

If you feel that it vibrates quite a bit too - then it may be only broken fan blade.

Fan blade - you are looking ar around $40-$50 and if this is a motor bearing - $60-$80. If anyone wants to charge you more - we will repair it but you will have to pay shipping both ways (roughly another $30 both ways all together)

Ohhh yeah - try it with the hose. If no sound then brush roll bearings may be bad...

Good Luck,
Rocky
:-)
If you want to send it for service - go to GoodVac.com click on SERVICE, print form, fill out and ship it here.

most likely your bearings are shot. it will need a new motor

It sounds like you may have a bearing problem. The motor bearing eventually gets damaged by the water vapor that is drawn in by the fan. This will cause a high pitch squeel from the motor. It is possible to replace the bearing, but it should be addressed by a professional techician.

Sounds like you have a clog. Make sure the filters are clean, replace if it has been more then a year, check the inlet down by the brush roll, your clog maybe there.