After replacing a blown fuse on my Geeetech GT2004, the desired temp = 0. The bed heats up just fine, but eventually the bed over temps. I haven’t reloaded marlin because I can’t figure out what to select from boards.h.
What’s my next step?
Prepare/ Preheat PLA/Preheat PLA Bed
▒46/0º ▒ 91/0º
X0 Y0 Z0
▒100% SD----% ▒–:--
Err: MAXTEMP BED
Prepare.pdf (59 KB)
1 Like
PeteD
2
Are you able to turn the bed off using the software? In other words, is there a short either in the board or wiring and the bed is heating all of the time? Do you know what caused your fuse to blow? Did you experience an external power surge or did a component on the board, such as the FET that drives the bed, fail?
I can still turn the bed off via software. It heats just fine but overheats. A close look under the magnifier didn’t show any damaged components. I reloaded Marlin and of coarse nothing works now.
PeteD
4
Going by your original post, the software was detecting the temperature as higher than its max setting and kicking out an error. The fact that you are getting a maxtemp error also suggests that your settings aren’t being overwritten by the EEPROM. You may want to double check your EEPROM settings anyway or ensure that the EEPROM is turned off in the software when debugging like this. I’m not sure what else in the software could cause the bed to continue heating beyond your limit. Usually when the bed gets too hot it is a hardware issue.
When does your bed run over temp? Does it occur during the initial heat up? After it has been running for a while? Immediately after you turn it off?
