Heating Failed Error

Overview

When the Viki displays a “Heating Failed” or “Bed Heating Failed” message, it’s signaling that the hotend or heated bed was unable to reach its target temperature within the expected timeframe. 

These warnings are built-in safety features designed to prevent overheating, electrical faults, or component damage. While the root cause can range from a loose connection to a failing heater cartridge or power supply issue, the error itself simply indicates that the system isn’t heating as it should. The following guide will walk you through a clear, step-by-step troubleshooting process to identify the cause and restore proper heating performance.

Before proceeding, please collect and record the following data: 

• Picture or video of the Viki controller display info screen
• Picture of the hot end heater wires going into the heater (from the front and under the sides)
• Picture of the Azteeg board

Possible Causes: 

1. Broken cable at heater end
2. Break in the head cable
3. Unplugged head cable wires
4. Unplugged from head cable connector (GB3, GB3+ or AMHE Upgraded GB2)
5. Defective heater (see instructions for heater cartridge testing) 

6. Heater block of hot end is contacting the heat sink

   

Possible Solutions: 

1. Verify all head cable wires are plugged in and wired correctly. 
2. Replace the heater (for broken cable at heater end or defective heater)
3. Replace the head cable (for break in the head cable)
4. Correctly reassemble the hot end:
   1. Heat the hot end to 200C
   2. Remove the fans
   3. Grip the heater block with pliers and then loosen the nozzle with a 7mm wrench
   4. Still gripping the heater block, use another set of pliers or heat proof gloves and unscrew the heat break (the tube that threads into the heat sink) from the heater block such that one thread is showing
   5. Screw the nozzle back in and tighten to 30 in-lb of torque.
   6. You can find a helpful video on the hot end anatomy here: Link and its proper assembly here: Link

Questions or concerns? Reach out to our support team at support@re:3D.org or open a support ticket.