Clogged Nozzle

On occasion, the nozzle of your hot end maybe clogged. This can be due to multiple reasons such as the following:

  • Bad Filament
  • Debris on Filament from improper storage
  • Mixing of different types of filament

Just to name a few reasons...

Whatever the reason maybe, there are a few ways to clear a clog.

Needle Thru the Nozzle exit

If you purchased a kit thru us, we provide customers with an acupuncture needle. Preheat the nozzle to 295C, we want the temperature to be well above any material previously loaded.

Once the temperature of the hot end is hit, raise the Z axis to it's max position. We want to be able to easily access the tip of the nozzle. Once you've moved the Z axis up and you have access to the nozzle, insert the needle through the nozzle tip.

We want to keep the needle as straight as possible. Gently push the needle through the nozzle. Repeat this process a few times, we want to dislodge and break up any build up/debris if it is present.

At this point, go to the LCD menu system and use the "Load Filament" option. If filament flows, mission accomplished and happy printing!

If not, let's move onto the next option...

Cold Pull Method

The Cold Pull Method is when we underheat loaded filament and remove entire strand manually so that we can 1) get an impression of the hot end internal 2) remove any debris/blockage with the said impression of the hot end.

With filament loaded, please preheat the hot end.

  • For PLA, suggested preheat temp for a cold pull is 160C
  • For ABS, suggested preheat temp for a cold pull is 210C

These are just recommendations, you can experiment with different temperatures. The idea is to soften the filament and ensure it does not become molten. If it is too runny, it will not be able to clean the entire barrel when we remove the filament strand.

As the hot end is heating up, remove the idler bolts entirely. We will be manually pulling the filament out, so it is best to remove any pressure on the idler to make our job easier.

Once temperatures are hit and the idler tension is removed, grab the end of the filament that is above the extruder. From there give a gentle push down and then a quick pull upwards. Inspect the end of the filament strand you just remove. There should be a nice conical shape, this is a sign that you are at a good temperature and not too runny. Snip the end of the filament and repeat this process a few times.

After doing this a number of times, retension the idler and load filament from the LCD menu system.

If filament flows, mission accomplished and happy printing! If not, let's move onto the next option...

Nozzle Replacement

Having gone through the above processes and the issue still persists, it's likely the nozzle will need to be replaced. Please look at the instructions we provide here.

Was this article helpful?

Can’t find what you’re looking for?

Our award-winning customer care team is here for you.

Contact Support