new thermistor not working? :(

so i got a replacement thermistor connected it all ect go to preheat and nothings working but the bed will heat up properly reads a
Actual temperature at 24c

any ideas
also i should note i hold the thermistor end with my fingers and it starts heating heh what gives so nothings broken im guessing


yes i am kinda nobish to all this

thanks

 

sounds like it's not making good contact with the kapton heater. Does the heater actually get warm?

 

kapton heater?
very slightly warm

 

the heater pad on the glass bed. It's called a kapton heater. Next time just google the word you don't understand.

If it's getting warm then your thermistor is not making good contact

How is it secured?

 

oh rite sorry lol just did how could i forget google
the bed is fine
the hot end isnt secured with anything yet i guess it should be ?
it just has some tape around it atm holding it in place how it came with the little rubber black thing
I did notice the new thermistor was slightly smaller than the one that came with it had to clean alot of melted plastic around it.

would some sort of sealer be better ?

 

Take a picture of hat you're refering to

 

it was just the ruber holding it in was working ok before had to clean it alot
no wires touching

 

Ok yeah push it in so that it's making contact with the metal, then put the plastic cover over it.

You can use some high temp silicone, like from an automotive store, or just use pressure to get a good contact.

 

alrite i think i got some lying around would it be cause its smaller its not making contact properly without the sealer?

 

Na that's the same size. It just needs a decent amount of pressure to be sure the glass bead is touching the metal.

 

got it thanks

 

have to go out tomorow and get some sealer nothing lying around atm
i could have swarn it worked fine just pushed in before unless there was glue on it cant remember now heh

 

alrite so i let it set but its still not heating when i click pla or preheat

 

not heating at all now the thermistor is working and showing normal temperature on matter control so that parts fixed but now it wont heat up heh
the bed is heating though

 

Make sure the nozzle is actually staying cold, but obviously don't burn yourself on it.

Otherwise check your connections for the heater cartridge

 

still the same

 

Ill drop my two cents here, If you get frustrated with the hexagon( its a hell of a lot better then the old jhead) you should drop some change on the e3d v6
http://www.printedsolid.com/shop/e3d/e3dv6/
NOTE: request an extra long piece of ptfe to extend it through the extruder to the hobbled bolt.

and then hook it up wiht one of this thermo-coupler
http://www.printedsolid.com/shop/e3d/stud-thermistor/

this is an unstoppable combo.

again i dont know if you are interested in spending money on this but most everybody on the forums has an e3d its the gold standard of print heads.