Trouble shooting for Err: MINTEMP

Hi,

My printer was working for 9 months. Today it is stopped with Err: MINTEMP.

Right now Extruder and Heated bed temparature are reading zero. If one of them shows zero I can do my troubleshoot for that part of the printer. But when both shows zero, where can I start my trouble shoot and what would be steps?

Here is min temp settings;
#define HEATER_0_MINTEMP 5
#define BED_MINTEMP 5

Any help, most welcome.

Best Regards

Edited 1 time(s). Last edit at 02/25/2016 04:32AM by yuzmemak.

It would be the same, except you basically do it twice. Once for the hotend thermistor and then for the heatbed themistor.

First thing to check: are they still connected to your controller?

Hi,

How can I check connection? Do you mean physical connection to ramp4?

Best REgars

I had the same issue yesterday for the first time, couldn't figure out why, I have my temp setting set weird, because I'm not heating anything at the moment, but that hadnt changed much, previously things where doing fine.
Luckily all on the same day 5 thermistors arrived of known value, my hotend temp started reading 47, while the new NTC was only 17, the other one was normally giving a good reading, and has had no heat but stilll managed to screw up...I thought perhaps wires, so swapped it out for new one...it was then that I then got the min temp err.
I fiddled with min temp settings, even though it kept defaulting back to 0...
the error persisted, until I did a reboot, and I havent seen it since.
So it could be your temp limits/settings, or a mix of that and extruder error(guessing here),
obviously need to know if your getting readings or not.

Hi,

My min temp settings are like these;

#define HEATER_0_MINTEMP 5
#define BED_MINTEMP 5

But I am reading 0 (zero) less than min temp settings which are 5.

Based on my limited understanding of it, perhaps heater or thermistor isnt working, if you have zero, and the and its expecting 5 or above, then the error kicks in.

Hi,

I checked thermistor with omhs meter and it gives me around 100K for heatedbed as expected.

Any troubleshooting guide for ramps or mega 2560? Could be board problem?

Best Regards