STOP THE BEEPING! - Ender 3 Thermistor Replacement - Fix Thermal Runaway Issue

In most cases the problem is a white powder residue on the thermistor. Just pull it out and clean the white powder off and blow out the hole, then reassemble. It's that easy. This happens a few weeks to few months after getting a new Ender 3. Just depends on how much you use it. Occam's razor, the simplest solution is usually the correct one.

My ears hurt every time this happens to me

Also the thermistor is put in the machine with thermal paste, like you would use to mount your cooler to your processor when building a PC. This paste dries out and becomes ineffective after about 1 1/2 - 2 years or so. Removing, cleaning and replacing the thermal paste is a maintenance item that will fix the problem. I was having an issue with inconsistent temps and thermal shutdowns (nozzle too cold) after about 1 1/2 years of owning my ender 3 v2 neo and replacing the paste fixed it perfectly.

Thank you

does this also work with the ender 3 v2 because it start beeping like that in the middle of a print

No that evil noise!! that evil EVILLLLLLL!!

I gotta replace the thing? OnO

Thanks BRO

one of my allen bolts that i need to take of got stripped and i cant take it out now fml

My printer makes the same sound, but I don't know if it's the same issue. I'm in PA. It's mid November. It's cold. My printer is out on the porch where it is screened-in, no windows. I only been using my printer since June, and never have an issue.. I have been printing since then, even in the cold (even when it's 40 degrees out it was printing fine especially with the dry box I bought for it). Today when I went to preheat the bed and nozzle, it made that sound. Is it because it is now 30 degrees? I don't know how much it's going to warm up weather-wise, but is it because of the cold weather? Or is it this problem. Thanks in advance.

the solder in the connector needs to be melted fully

Great video! You've just enabled me to fix my printer by replacing the hot-end thermistor. Thanks!

THANK YOU. All my stuff has been breaking and needed to print something tonight but alas this issue has been building up for WEEKS and I knew this repair was coming, but I had made it into a big deal in my head. Thanks for sharing what your issue was and how you solved it because this has been driving me nuts and confirms my suspicions about the thermistor. Im managing to trick it into printing for now but its a bit of a luck game and a lot of patience and babysitting

hypothetically how many times can you cut the existing wire, lets say multiple splices, before you would have to replace the whole wire?

yeah fuck that sound god dam, thanks for the video.

btw apology accepted lol

i cant find a Store to save my life for Kapton Tape.... id there an alternative. i know Kapton is the brand name. i know its polymide tape... just want to make sure its sufficient for 220*c. and doesnt melt. Lowes, Home depot. ACE hardware.. Staples... nuthin. all i can find is Amazon.

only started having this issue intermittently because while I was replacing a nozzle I forgot to set it to 200° and instead cranked it to 260°
The first time it happened I was horrified, like oh F I justed started a fire. when no, it was a crybaby lil thermistor that couldn't handle itself

Allah razı olsun güzel insan 🌹🌹

I know you saw the comment saying it's sometimes that it got dust on it but I've also heard some people say that it happens when the screw just needs to be tightened.

great video, I experienced problems lately that my printer in the middle of its print gives the "Heating Failed" error. i replaces the Heater cartridge and Thermistor but still gives this problem... at around 150-180 °C the problem occurs. any tips what i can do ?

Hi. in my case, there is not a E1 warm. just the "THERMAL RUN AWAY Printer halted' text and thats all. I tried to move cables for if a false contacts appears but machine stills works normally l. Like you, printer starts fine but in some moment, will song a beeper and printer stops.

Just had this happen 😅

This happens every time I print anything. It happens after the first mm of printing

Also another cause is the wires solder from the bed plate is not attach will have to re-solder back to bed plate.

I actually found that my ender 3's thermistor screw was undersized leading to unscrewing overtime but by the time I realised I screwed it back so many times that it ate through the thermistor wires and now I'm here since the reduced resistance leads to 10-20C lower temperatures recorded than what it is and I'm justnot comfortable with the idea of just settign that much higher for obvious reasons.

This has just happened to me after flogging the Ender 3 Pro without a break for about 15 months. I have removed the fan shroud and found it clogged with dust as well as part of the hotend, I'm hoping this will fix the issue but the next thing to try is removing the thermistor as suggested. Should all this fail I have a new thermistor ordered and arriving soon. Thanks for the tip.

i got a defective ender 3 pro one of the screw holes wasnt straight with the other and ive got like 3 dif errors counting this one.

The first time i heard that on my printer it scared the crap out of me

Easy instructions. Fixed my issue 1st try. Thanks!

Thanks for a great video……off to Amazon to buy new thermistors 😊

Thanks for an easy to follow repair video. Got mine up and running again for $10 and didn't have to bring it in for service

yea it did not work

Tthank you very much. Botucatu-Brazil. Friendly hug 🤗

What size of splice did you use? 1/16th?

Thanks for the video. I found the white powder surrounding the thermistor, but after cleaning the head got hot, but not enough to melt the filament. I cranked the temp up to 255 C, but still the filament did not melt. I guess I new a new thermistor.

The bed of my printer is also over heating. Will it fix the problem?

The thermistor screw on mine is off but the wire won't come out. The whole thing is a bit gunky, but it could also be the plastic bit you mentioned. How do I pull the wire out now?

Great! Thank you for sharing this!

I’ve had my Ender 3 for only a month and a half and the thermistor already failed. It doesn’t read the temp at all. It just says error. So I assume the wire is broken somewhere but whatever at this point I’m just gonna order that kit and put a new one in.

Nostalgie 😂

I have a cr10 v3 and after changing the thermistor my printer now shows very high temperature even when its not printing

yo no e cambiado nada le puse un poco de pasta termica y va de lujo

Got this sound on my brand new Ender 3 pro on the First print and then again on the second print first step is checking your connections.

😡Fokn Planned Obsolescence‼
This is fOk'n BULLSHIT thaybi have to do this already‼ I barely even used this CR10 and I bought it brand new...
FOK'N FOK‼😡
Thanks for sharing though 😅👍

Was a little scared to start cutting wires as I'm not experienced, but got it done. The shirk wrap solder sleeves are fantastic. Finished two weeks agon and probably have 24 hours of printing with no more interruptions. Many Thanks. (Subscribed)

How can I be confident this won’t happen during a long print where there’s no supervision? I don’t want to burn my house down

thank you this help me a lot it happened to me and I got so scared that it broke thanks for the help

But how did you know which way to hook up the wires?
Also, how did you exactly get the thermistor to stay in the hole? Then you're supposed to screw in the screw while the termmistor is in the hole too?

Thx my printer is almost year old and just started. Ugh will need to replace my thermistor also as tonight the 2nd time mine buzzzzzesss hehe. So i knew hey FLATLINER!! Charge!! Clear ! Ok doc we have a pulse 😂

Mine says "outage recovery" a few seconds into a print although it never even turns off. could this be the same issue?

How did you get such great top layers ? Settings? Iron?