When i on the machine, the sound is not as loud as usual, then i realise the water is not spinning. suction seems to be ok, it still pick up hair, but water is not spinning to cleanse it. :( i pressed reset button, wash the separator, didn't help. any idea? thanks in advance!
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Although a wet/dry vacuum, it cannot tolerate water in the motor. Water will cause the motor to short out, which will cause the motor to act/sound like yours does now, if it continues working at all.
To prevent additional problems, the vacuum needs to be taken to an authorized Rexair dealer for cleaning and repair. Expect at the very least to pay for a new motor and installation.
Problems like this are why I don't care for any wet/dry vacuums, especially spendy ones.
Oh, you should definitely discontinue use, and don't attempt repairs on your own. Special tools are needed, and if bolts and screw are rusted, breakage may result.
Remove hose and turn on the unit with nothing on the intake - see if it helps - feel the suction with hand.
a) If it works fine without the hose - look for a clog in the hose, wand or the nozzle
b) If the suction is weak even without the hose: Clean the separator, If this is e-series or E2 Rainbow - remove HEPA and try vacuuming without it (sometimes it is too dirty so stops good airflow). New HEPAs HERE. If this is SE Rainbow - remove exhaust cap and if there is a sponge - take it out
You will have A blockage in either the wand or hose, completely remove them from machine the hose unclips at the bottom back of machine,
Now switch machine on with this removed if machine sounds ok then remove the blockage from hose or wand.
If machine still poor suction & noisey with hose & wand removed check the (U) shaped inspection port for blockages.
Is the water seal in place or missing? Another cause would be a bad motor, running at a slower speed will mean low suction. If it is a motor, then you would have to replace it. Is the suction low at machine without the hose, if it is ok then may be a clog in the hose.
If the suction at the port that the hose hooks into has low suction, then most likely you have a problem with the motor. Some of these Rainbow motors sound ok running, but are running at a slower speed, thus reducing the suction and replacing the motor is the solution.