Description
Replacement Heater & Thermistor for Qidi Tech Plus 4
This ceramic heater and thermistor assembly is a direct replacement for the heating and temperature sensing components in the Qidi Tech Plus 4 hotend. It restores fast, stable heating and accurate temperature control for consistent extrusion across all filament types — from PLA through to high-temperature materials like PA-CF, PC, and PET-CF that the Plus 4 is designed to handle.
When to Replace
Temperature error codes on the printer screen, nozzle temperature fluctuating during printing, slow or inconsistent heat-up, thermistor readings showing abnormal or erratic values, and the printer halting due to thermal safety faults. If reseating the connector doesn’t resolve the issue, the heater/thermistor assembly is the most likely failed component.
Compatibility
This kit is designed specifically for the Qidi Tech Plus 4. It is not compatible with the Qidi Q2, Max 4, or older Qidi models — those printers use different heater configurations.
Installation
Power off the printer and allow the hotend to cool completely. Disconnect the old heater/thermistor assembly, remove from the hotend, install the new unit, and reconnect. No soldering required. Run a PID auto-tune after installation for optimal temperature stability.
What’s Included
Ceramic heater and thermistor assembly × 1 (for Qidi Tech Plus 4)





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