Hello everyone,

I'm new to this forum and also new to fixing my Ord Bot printer. Problem I am having is the extruder is not working. I think I have narrowed down the problem of why. I am melting ABS plastic at 230° C. Digital display sames it is 230° C. I have a Infrared temperature gun pointed at the heater block and it is no where near 230° C. More like 90° C. My guess is that the thermistor is bad or the heater is bad. Is it common for the thermistor to go bad? Do these things have to be calibrated? What needs to be replaced?

Thanks,