# 24V Heater Cartridge **URL:** \ **Category:** Hardware\ **Created:** [June 19, 2016, 11:53pm UTC](https://forum.lulzbot.com/t/24v-heater-cartridge/3617 "2016-06-19T23:53:29Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![PlasmaFlow](https://avatars.discourse-cdn.com/v4/letter/p/e9c0ed/32.png) [@PlasmaFlow](https://forum.lulzbot.com/u/PlasmaFlow)\ **Post date:** [June 19, 2016, 11:53pm UTC](https://forum.lulzbot.com/t/24v-heater-cartridge/3617/1 "2016-06-19T23:53:29Z")
Is there a way to test a 24V Heater Cartridge? What I mean is, if I use a VOM, What would be a correct resistance value for the cartridge? I currently have a cartridge that even though I tune the PID for the heater, it never gets to temperature after the PID values are flashed again. I also bought some extra cartridges and when I measure them the values are different even when they are supposed to be 24v 40w. I also read that for using heater cartridges PID is better than Bang mode? Is this true? Thanks! ---
**Author:** ![kmanley57](https://avatars.discourse-cdn.com/v4/letter/k/13edae/32.png) [@kmanley57](https://forum.lulzbot.com/u/kmanley57)\ **Post date:** [June 20, 2016, 12:29am UTC](https://forum.lulzbot.com/t/24v-heater-cartridge/3617/2 "2016-06-20T00:29:17Z")
> [@PlasmaFlow](#): > > Is there a way to test a 24V Heater Cartridge? > > What I mean is, if I use a VOM, What would be a correct resistance value for the cartridge? > > I currently have a cartridge that even though I tune the PID for the heater, it never gets to temperature after the PID values are flashed again. > > I also bought some extra cartridges and when I measure them the values are different even when they are supposed to be 24v 40w. > > I also read that for using heater cartridges PID is better than Bang mode? Is this true? > > Thanks! ~.8 ohms for a 30 watt. ~.6 ohms for a 40 watt. The lead probe contact resistance will affect your reading a lot if you do not have a good connection when measuring.