Wet/Dry Vac Stops Sucking: Manual Notes by Model

Why suction stops on the models named here

The manuals cited here describe a float that cuts suction when the container reaches a set level or is full. On the RIDGID 6000RV0 and WD40800, suction stops and the motor pitch rises. On the DeWalt DWV010 and DWV012, a ball float valve blocks air to the motor when the canister is full. On the Kärcher WD 2 Plus / WD 3 and WD 5, a float closes the suction opening when the container is full. The sections below give each model’s wording and the steps its own manual lists.

What changes by model

The table has one row per manual, and each model name links to its document.

Kärcher

The WD 2 Plus / WD 3 operating instructions, document 59510380 (05/23), name WD 2 Plus / WD 2 Plus S and WD 3 / WD 3 S / WD 3 P / WD 3 P S on the cover. Its full-container section reads: “When the container is full, a float switch closes the suction opening and the device runs at a higher speed. Switch off the device immediately and empty the container.” For these models, the manual adds: “If the device falls over, the float can also close. To make the device capable of vacuuming again, set up the device, switch it off, wait 5 seconds and then switch it on again.”

The WD 5 operating instructions, document 59687950 (02/19), name the model WD 5. Its wet-vacuuming note reads: “If the container is full, a float closes the suction opening, and the appliance works at a higher speed. Switch off the appliance immediately, and empty the container.”

For declining suction, the WD 2 Plus / WD 3 manual lists clogged accessories, suction hose or suction tubes (“Remove the clog with a suitable aid.”), a full filter bag (“Replace the filter bag.”) and a dirty foam or cartridge filter to clean, followed by a damaged filter to replace (“Replace the foam filter / cartridge filter.”). The WD 5 manual lists a clogged accessory or hose, a full filter bag and a contaminated flat fold filter.

On the WD 2 Plus / WD 3, the manual says: “Do not use a filter bag when vacuuming wet.” It also says: “Always ensure that the foam or cartridge filter is inserted, for both wet vacuuming and dry vacuuming.” The WD 5 manual says: “Note: Do not use a filter bag for wet vacuuming!” WD 5 requires its flat fold filter for wet and dry pickup. Both Kärcher manuals require dry filters for dry pickup and complete drying after washing.

DeWalt

The DWV010 instruction manual names the DWV010 on its cover. Its float passage reads: “The ball float valve (R) will block air to the motor when the canister is full and the sound of the motor will change at once. When the motor has a high pitched sound and air/water flow stops, empty the canister.” A notice adds: “DO NOT remove ball float (R), doing so will cause damage to the vacuum.” Its suction table lists “Remove blockages in the suction nozzle, suction tube, suction hose or filters.” Its thermal-overload entry says to turn the vacuum off and disconnect it, empty the canister if needed, allow the unit to cool, then plug in and test. If it will not restart, the manual gives 1-800-4-DEWALT.

The DWV012 instruction manual names the DWV012 on its cover. This PDF sits on DeWalt’s Spanish-language support site (the hc/es path), and its English text is quoted here. Its float passage uses the same wording with ball float valve (V), and its notice reads: “DO NOT remove ball float (V), doing so will cause damage to the vacuum.” Both DeWalt suction tables list blockage removal, bag replacement, filter-installation checks, filter cleaning or replacement, and canister emptying, in that order. Its thermal-overload entry matches the DWV010 steps. The manual also describes the DWV9402 fleece bag, which “should be disposed of once the airflow becomes restricted. DO NOT reuse this bag.”

RIDGID

The RIDGID 6000RV0 owner’s manual names the 6000RV0 on its cover. Its liquid section says the float mechanism “will rise automatically to cut off air-flow. You will know that the float has risen because suction stops and the motor noise will become higher in pitch, due to increased motor speed. When this happens, turn off the Vac, unplug the power cord, and empty the drum.”

The WD40800 owner’s manual names the WD40800 and gives the same float description, saying that “Vac airflow ceases”. Its contents list includes the Qwik Lock™ Filter, VF3500.

On the 6000RV0, the filter guidance depends on the amount of liquid. For large amounts, the manual says: “it is recommended that the filter be removed. If the filter is not removed, it will become saturated and misting may appear in the exhaust.” The WD40800 manual says: “we recommend that the filter be removed.” Both manuals say the filter must be dried after liquid pickup “to avoid possible mildew and damage to the filter.”

Both manuals also warn: “Do not continue running when float has cut off suction.” and “Do not operate without filter cage and float, as they prevent liquid from entering the impeller and damaging the motor.”

Checks by symptom and model

• Suction stops and the motor pitch rises during liquid pickup. On the RIDGID 6000RV0 and WD40800, turn off, unplug the power cord and empty the drum. On the DeWalt DWV010 and DWV012, empty the canister when the motor sound turns high-pitched and air or water flow stops. On the Kärcher WD 2 Plus / WD 3 and WD 5, switch off immediately and empty the container.
• Kärcher WD 2 Plus / WD 3 after a fall. The manual says the float can close after a fall. Set the device up, switch it off, wait 5 seconds and switch it on again.
• Declining suction. On the DeWalt DWV010 and DWV012, clear blockages in the nozzle, tube, hose or filters, and replace the paper or fleece bag. On the Kärcher WD 2 Plus / WD 3, remove the clog with a suitable aid, replace a full filter bag, clean a dirty foam or cartridge filter, and replace a damaged filter. On the WD 5, clear the obstruction with a stick, insert a new filter bag, and clean a contaminated flat fold filter. For other suction problems, see the no-suction guide and the hose-clog guide.
• RIDGID 6000RV0 filter wet after liquid pickup. The filter can saturate and produce exhaust mist. The manual recommends removing it for large amounts of liquid and requires a dry filter for dry pickup.
• DeWalt DWV010 or DWV012 stops running. Follow the thermal-overload steps above. For a related procedure, see the overheating guide.

As a precaution, unplug the vacuum before inspecting any part.

Manufacturer contact information and precautions

As a precaution, if the checks for your model do not restore suction, stop using the vacuum and contact its manufacturer. The DeWalt manuals give 1-800-4-DEWALT (1-800-433-9258) for a vacuum that will not restart after cooling. For a general list of fault routes, see the corded vacuum troubleshooting hub.

The DeWalt manuals say not to remove the ball float, and the RIDGID manuals say not to operate without the filter cage and float.

Frequently Asked Questions

What does a higher motor pitch indicate on these models?

The RIDGID 6000RV0 and WD40800 manuals tie a higher motor pitch to the float rising. The DeWalt manuals describe a high-pitched motor sound, with air or water flow stopped, as the sign to empty the canister. The Kärcher WD 2 Plus / WD 3 and WD 5 manuals describe a higher running speed when the float closes.

What do the DeWalt and RIDGID manuals say about the float?

The DeWalt DWV010 and DWV012 manuals say not to remove the ball float, because doing so damages the vacuum. The RIDGID 6000RV0 and WD40800 manuals say not to operate without the filter cage and float.

What does the Kärcher WD 2 Plus / WD 3 manual say after a tip-over?

The WD 2 Plus / WD 3 manual says to set the device up, switch it off, wait 5 seconds and switch it on again.