Loss of Suction Power — How to Fix

Reduced suction is the most frequently reported issue for the Acme ProClean V12 — and in nearly every case, it's caused by one of a small number of easily resolved problems. Follow this structured guide to restore full performance.

Understanding How Suction Is Lost

Your vacuum maintains suction by creating a sealed, low-pressure airpath from the floor head through the wand, into the cyclone, through the HEPA filter, and out the motor exhaust. Any disruption to this sealed path — a blockage, a full bin, a clogged filter, or a leak — reduces suction. The fix is to find and clear the disruption.

Step 1: Empty the Dustbin

A full or nearly full bin is the number one cause of suction loss. Even if the bin appears only partially full, compacted debris can block the cyclone inlet.

1. Empty the bin completely.
2. Check the cyclone inlet — the circular opening where debris enters the bin. Remove any matted hair or compacted debris by hand or with the crevice tool.
3. Test suction. If noticeably improved, the bin was the cause.

Step 2: Inspect for Blockages

Blockages can lodge in the floor head, wand, or the inlet at the base of the main unit.

1. Floor head: Detach the floor head and look through the inlet port — you should see clear daylight at the other end. If not, a sock, large debris, or compacted hair is lodged inside. Use a blunt rod to push it through.
2. Wand: Detach the wand at both ends and look through it lengthwise. Again, clear daylight should be visible. Clear any obstruction from the wand end.
3. Main unit inlet: Look into the base inlet of the main unit. Compacted hair frequently lodges here, partly restricting airflow without completely blocking it.

Step 3: Clean the HEPA Filter

A clogged filter is the second most common cause of sustained suction loss — particularly if the filter hasn't been washed in more than 4 weeks.

1. Remove the filter (twist counter-clockwise from the top of the main unit).
2. Hold it under cold running water until the water runs clear.
3. Allow to dry completely — a minimum of 24 hours.
4. Do not use the vacuum without the filter installed.

Step 4: Check the Sealed Airpath

If suction is strong directly at the main unit inlet but drops through the wand or floor head, there is an air leak at a connection point.

1. Detach and firmly re-click each connection: wand to main unit, floor head to wand.
2. Check the dustbin seal — the rubber gasket around the bin rim. Wipe it clean with a damp cloth. If the seal is cracked, torn, or deformed, it will allow air to bypass the filter, dramatically reducing suction. Contact support for a replacement bin.
3. Check the filter cap seal — ensure the filter is twisted fully clockwise and seated flat with no tilt.

Step 5: Check the Brush Roll

A heavily tangled brush roll does not directly reduce suction, but it reduces effective cleaning by failing to agitate carpet fibres. If the floor appears unclean even with normal suction, clean the brush roll (see: Cleaning the Brush Roll and Removing Tangles).

If Suction Remains Poor After All Steps

Contact Acme Support. Provide your model, serial number, and a description of the issue including which steps you've taken. Persistent low suction after all the above checks may indicate a worn cyclone assembly, motor fault, or damaged bin seal — all covered under the standard 2-year warranty.