3D printer overheated: What to do?

An overheated 3D printer can lead to problems such as Warping, deformed print objects, and unexpected print failure. Learn how to identify the causes and take countermeasures to prevent overheating.

The most important facts in brief:

  • Avoid 3D printer overheating
  • Identify possible reasons for overheating
  • Symptoms of an overheated 3D printer
  • Implement measures against overheating
  • Control and lower the temperature in the housing

3D printer overheating

Overheating is a common problem in 3D printing that can lead to various printing errors and even damage to the device. It is important to understand the possible reasons for overheating in order to prevent it and optimize the printing process.

Reasons for 3D printer overheating

DIY case, but poor airflow in it

A homemade case can restrict air circulation and thus lead to overheating. Make sure that the housing is sufficiently ventilated.

Heating bed temperature too high

A too high heating bed temperature can lead to overheating of the entire pressure chamber. Check the recommended temperatures for the material used and adjust accordingly.

Pressure temperature too high

Excessive print temperature can also contribute to printer overheating. Pay attention to the filament manufacturer's recommended temperatures and set them accordingly.

Print speed too high

Too high a printing speed can increase the temperature in the printing chamber and thus lead to overheating. Reduce the printing speed to lower the temperature.

Failed or dirty fans

Defective or dirty fans can affect the cooling of the printer. Clean or replace them as needed.

Multiple print objects too close together

If several print objects are placed too close together, the heat cannot be dissipated effectively, especially for filaments with high printing temperatures. Make sure to leave enough space between the print objects.

Detect an overheated 3D printer


Warping is an indication that the printer has overheated. The corners of the printed object stand out from the heating bed because the layers cool unevenly.

Deformed 3D Printing Objects

If print objects are deformed or warped, this may indicate that the printer is overheating. Uneven cooling of the layers can lead to a change in shape.

Zits and blobs on print objects

Zits and blobs are small bumps or lumps that can appear on the surface of printed objects. They may indicate overheating of the printer and related problems with layer formation.

3D printer stops printing unexpectedly

A sudden print abort may be due to printer overheating when internal safety features stop printing to prevent damage to the device.

Suddenly different pressure behavior (possibly after construction of a DIY housing)

A sudden change in printing behavior, especially after building a DIY enclosure, may indicate that the printer is overheating if the enclosure is interfering with cooling.

Measures against overheating of a 3D printer

Prints with a standard profile of the slicer

A standard profile in the Slicer takes into account the recommended temperatures and printing speeds for the material used. Use such a profile to minimize the risk of overheating.

Pay attention to the manufacturer's specifications of the filament

The filament manufacturer's recommendations regarding printing temperature, heating bed temperature and printing speed are important guidelines to avoid overheating the printer.

Prints outside the housing if necessary

If the enclosure is the primary cause of overheating, consider printing without an enclosure to allow for better air circulation and cooling.

Decrease the pressure temperature and heating bed temperature

Reducing the pressure temperature and heating bed temperature can help minimize the risk of overheating. Make sure that you do not go below the recommended temperatures for the material you are using.

Reduce the printing speed significantly

A slower printing speed can lower the temperature in the printing chamber and thus reduce overheating. Be careful not to reduce the speed so much that it causes other printing problems.

Checking and lowering the temperature in the housing – This is how to do it

  • Install temperature sensors in the housing to monitor the temperature.
  • Use fans or ventilators to improve air circulation.
  • Make sure that the ventilation slots in the case are not blocked.
  • Use a case with temperature control or automatic fan control.

Can an overheated 3D printer catch fire?

In extreme cases, an overheated 3D printer can actually pose a fire risk. To minimize the risk, you should observe the following safety measures:

Regular maintenance and cleaning

Keep your 3D printer clean and perform regular maintenance to ensure that all components are working properly.

Use of high quality materials

Use high-quality filaments and components to reduce the risk of overheating and other problems.

Installation of a smoke detector

A smoke detector near your 3D printer can provide early warning of smoke and potential fires.

Automatic shutdown

Some 3D printers have an automatic shutdown function that turns off the printer when a certain temperature is exceeded. Make sure that this function is enabled.


Overheating a 3D printer can lead to a variety of problems, from printing errors to potential fires. By identifying the reasons for overheating and taking appropriate action, you can improve the performance and safety of your 3D printer.

FAQ: Frequently asked questions & answers about 3D printer overheating.

It is advisable to check your 3D printer regularly for signs of overheating, especially before and after long printing sessions.

Materials with lower printing temperatures, such as PLA, tend to overheat less than those with higher printing temperatures, such as ABS or PETG.

It is generally risky to leave a 3D printer running unattended, especially overnight. Make sure that all safety measures have been taken before operating the printer unattended.

The ideal printing temperature depends on the material used. Pay attention to the filament manufacturer's recommendations and perform tests if necessary to find the optimal temperature for your specific filament.

High ambient temperature can contribute to overheating of your 3D printer. Make sure your printer is in a well-ventilated area and not exposed to direct sunlight to aid cooling.