Will not work with my sand filter why - Kokido Zappy Automatic Above-Ground Pool Vacuum Cleaner K751CBX

Fine dust from sparkle will clog a bag or filter very quickly even though the bag is not full or even close to full. The air can't pass through the bag so it is popping the door open. Drywall dust can ruin a vacuum motor very quickly. I use a shop vac style vacuum with a cartridge filter that still clogged up after just a few minutes of vacuuming the dust but I can take the filter outside and hit it against something and use a small soft brush to clean it.

You are probably right. There is not enough air flow around the motor. It uses the air from the vacuum as the cooling air.
There is a secondary filter after the first filter bag. You may think the bag is not full and don't think you need to change. Sometimes the material you vacuum is so fine that it will clog the filter bag. I've done it vacuuming sheetrock sanding dust. Then just below the main filter is the secondary filter. Depending on the age and amount of use, there could be other problems. Motor brushes about to fail. A wire connection that separates as temperatures rise. Then reconnects when "cool". Plug end may be a problem. Its connection to the switch. The switch it'self could be.

I have a DC-07 Animal and I have taken it apart many a time and cleaned at least the plastic parts. Its all modular. I would just make sure nothing is clogged.. Remember the Hepa filter is not washable just the sponge filter. So if you took out the filter and left in the Helpa filter I would order a new Hepa filter - its probably clogged by now! Beat of luck!

I’m happy to help further over the phone at https://www.6ya.com/expert/charles_6bf94c079488b145

Clean sand granules out of the motor! the problem appears to be sand granules from the sand filter jamming the "pulse motor", unplug take the water cart off, unscrew the back cover, the one with the label (6 crosspoint screws) beware the 2 long ones holding the end! inside the cover there is a small bulge, next the pipe,, unscrew 3 screws these it reveals the motor squeeze the pipe clip slide back pull forward, to release motor blow through,the tiny hole backwards, until clear, you may have to use a blunt toothpick! to release, the stuck granules...Blow, blow, then reassemble

Most commercially made disc sanders have replacements pads whether they are hook and loop type or the rubber. If you go to the manufactures web sit and look up your sander, it will usually be listed somewhere. But you might have to call an authorized repair center to find the part number to order.

# 1 myou just take the bag out make sure ytou sponge filter is in place athe top and turn it on the power switch just turns on ,machine ther is no wet dry switch just an empty bagless cannister is all you need make sure the ball outlet in vacumn is working it stops water from overfilling cannister # 2 just use the proper bag and attachment to vacumn up the drywall dust a good building supply store has special sanding attachments for vacumn so you can sand and vacumn at the same time

the filters in your unit are abole to stop sand particels getting to the motor chancse are the motor is now dead but this is not a repair you shound under tack as dyson are realy nasty to tack apart and put back to gever due to a lot of platic clips in hard to reach places and if they brak the unit is no god

try changing the filter.

This type of vacuum is not designed to vacuum up sheetrock
dust or pieces of sheetrock. The dust from sheetrock is so fine it will clog the vacuum bag, filters and possible the motor

So change the bag, use an air hose to blow out the motor area and
the hoses make sure that air hose has in line filter to catch moisture