- Check Front Fan
The front fan may not be spinning, may be missing blades, spinning slowly, or mounted incorrectly. Visibly check for any of these issues. Also check to ensure that the fan is getting 12 volts of power at max fan speed. If it is not, it is spinning slowly. The fan will need to be replaced or remounted.
- Check Fan Spacer
Your fan spacer may be missing. If so, replace it.
- Heat Sink is Backwards
Your heat sink may be mounted incorrectly. If the fins are facing in, towards the extruder assembly, then you will need to flip your heat sink.
- Check PTFE Liner
The PTFE liner may be black or burnt. If this is the case, it needs to be replaced.
- Poor Quality or Bad Filament
You may be using filament that is of low quality or has irregularities in its shape. This can slow the flow of filament or can stop it altogether. Try using a different spool of filament and see if the problem is still present. You can also measure the amount of filament that is extruded with calipers to ensure that the stepper motor is extruding the correct amount.
- Hobbed Gear is Clogged
A piece of filament may be stuck in the teeth of the hobbed gear. If this is the case, use a wire brush or toothpick to clean out the teeth. This gear may also be worn down and may need to be replaced.
- Dropped Temperature
The hot end may suddenly drop in temperature. Watch your temperature to see if the temperature drops rapidly by twenty or more degrees or if it drops gradually. If the drop is quick, there may be faulty wiring, a faulty heater cartridge, or a faulty thermistor. To troubleshoot these problems, check the Troubleshooting Chart for Issues with Heating and Temperature Regulation. If the drop is gradual, then your parts fan may be spinning too fast or your ceramic insulation may be damaged or missing.
Warranty: Replacing parts on your 3D printer may result in its warranty being voided. If you are having difficulty and are unsure if your printer is still under warranty or wish to prevent voiding your warranty, please contact our technical support team for assistance.
Safety: Always exercise extreme caution when working on any electrical device, including your 3D printer. Ensure that the printer is turned off and the power plug is removed from the power outlet. Also ensure that the printer has fully cooled down prior to working on it.