I have a Vax slimvac vaccum when its charging red light and green light flashes what does that mean? If its charging properly or not?

This means the batteries are no longer able to be charged and have to be replaced.

Bad battery sir. Glad I could be so helpful.

Hi Yvonne, A flashing blue indicates that the battery is charging. No light indicates the battery is fully charged. A flashing red light indicates that there is a fault,

Clean the brush roll and be sure nothing is restricting it from turning freely.

Piece of ka, return to store...

check to see if the unit is clogged with debris - assuming it is empty.

Hi I have a vax mach air light.the brushes wont turn but the green light is on. I have checked eveything .The little button on side tube no blocks .Checked all filters.

yes the reason the green and red light were flashing the way they are is because its a warning to you that the battery is either no longer good or there is problems with your wireing. Also those vaccumes were designed to not charge when there to cold or to hot as a saftey issue.

Hi.

If the red light is solid, that means that the Roomba is near to full discharge. If the light is flashing red, then the Roomba is completely out of charge.

If the Roomba is fully charged, then there may be a fault.

Here full list of light codes:

Pulsing Amber - Charging
Green - Fully Charged
Amber - Partially Discharged
Red - Almost Fully Discharged
Flashing Red - Fully Discharged"

Here manual

See also
Roomba DISCOVERY MODELS' DIAGNOSTIC TESTS