Before you install your heater cartridge or heater element, you should double check that you both purchased and received the correct voltage cartridge.
Cartridges are laser etched with their voltage, but all it is worth double-checking anyway. This process is less annoying than putting out a house fire. If value is not within expected resistance is most likely a faulty heater cartridge or may not incorrect specification. If that is case, please disposal of the heater cartridge if reading no resistant (short) or you may have purchased or have supplied incorrect voltage.
Another common issue is a poor or damaged crimp, if it’s not a bare wire or ferrule connection. If this isn't a new assembly and you've removed or plugged in the heater by pulling on the wires instead of the connector, this can damage the crimp and cause a poor connection. Another option is measuring directly at heater connection point such as common ceramic ring heater.
TABLE OF CONTENTS
Heater Expected Resistant Values
| Heater Cartridge Voltage/Wattage | Resistance (Ω) |
|---|---|
| 12V 30W | 4.8 |
| 12V 40W | 3.6 |
| 24V 30W | 19.2 |
| 24V 40W | 14.4 |
| 24V 50W | 11.5 |
| 24V 60W | 9.6 |
| 24V 70W | 8.2 |
| 24V 120W | 4.8 |
Calculation via ohms law for the expected resistance of heater, for non listed wattage and voltage size.
V x I=P
I x R=V
How to Probe:
(If you have issue location suitable probe point, please reach out to support for assistant)
Video Example for Prusa MK3 thermeristor or our DRHOTSWAP Module Connector
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