Maybe my prev post too long CAN A HEATER ON HOT END GO BAD??

HELLO Can my heater go bad in the hot end? I get "failure to heat" messages. Not the bed, ran test, no problems. More or less isolated to hot end. Would watch temp rise to 200. Start out fine but after 120 would climb, then drop back cpl degrees. This would happen few times and never get higher than 170. SO CAN THAT LIL BARREL HEATER GO BAD AS I DESCRIBED??

There isn't much to a heater cartridge, but they can fail. It's also possible that the wiring connections for the heater are failing. Consider to check the points in the wiring where it changes in any manner. If you have a direct wire from the heater cartridge to the main board, examine the connectors at the main board. If the connection is weak, it will heat up in the connection block instead of the heater. If it deteriorates sufficiently, you could have fire.

Useful information to provide for your future posts would be the model printer you are using.

Fred Thank you sir Youve given me a poss cause. Ill look into tomarrow

OK I flipped over printer and checked all connection to the stock mainboard. I checked with continuity meter to see wires are good to heater, they were good. I then ran nozzle temp alone up to 150, that was good. Then 160, that was good. Then I tried 180 and around 168 the message popped up again. GRRRR

Ender 3 Pro
Ender Extender 300XL ( 300x300 bed) Mirror bed
120 volt 750W heater, SSR, and insulation blanket
Dual Z screws
All metal extruder
NEW 1k Thermister I thought that had gone bad(original 2+years old) Nope not cause

Do you have the printer connected to a computer? Does the Ender support a USB connection to a computer? If so, consider to install Pronterface (might be called something else by now) or OctoPrint, as both of them allow graphs to be viewed in real time while the system performs the tasks. Sometimes that information can be useful. Since you can get to 168, command the printer to 160 and observe the graph.

NO I install gcodes by SDmini card Yes there is a usb on the mainboard, But I dont believe it can "chat" with my pc due to original 8 bit ender board still installed. I do have a new SKR 1.4 turbo and drivers , a CLTouch, wifi, and some other parts, I was hoping to get the 8 bit running so I could print a 1.4 case. I woner the firmware got messed up? somehow?

Yes it does sound like firmware gone. AWOL but the ender 3 does not have a boot loader !!! That was one of the reasons I got a Sapphire pro. to join the ender.

I read an article late last night where fella was having same issues. It described how to take resistance (ohm) measurement of heater and what value it should be. Keep fingers crossed After I get all the upgrades installed, you wont reconise it as an ender

HMMMMMMMM What I read was that the hot end barrel heater should have resistance of ~19 ohms I measured 0 ohms Well reinstalled wires onto mainboard. MADE SURE TIGHT. hot end got up to 162 then FALURE TO HEAT RESET GRRRRRRR

I think you have very much proved that then next step is the firmware!

dont think heater barrel in hot end the culprit?

Surely it's not a good idea to do am upgrade until you've got the basic unit working!!!

Remember good/stock resistance should be 19 ohms Mine reads 0 ohms

Sorry I missed that the resistance of a 50 watt Heater at 24 volts should be about 2 and a bit ohms cold and twice that at ,12volts. If it reads 0 ohms hot the PSU should shut down. Did you measure the resistance hot or cold??.

Sorry I got that all wrong I should have said 12 ohms at 24 volts or a current of 2 amps and 3'ohms at 12 volts must be getting old a silly mistake.

I did when it is not hot the printer is off

Did you also disconnect the heater from the power supply ?

YES The 2 wires were disconnected

LOL I wrote to creality and they are closed for SPRING BREAK for Jan 31 to feb 7 Its 20 degrees here LOL

Tried again "Heating Failed PRINTER HALTED Please Reset"

That the heater warmed up at all puzzles me 0 ohms is a short circuit should shut the power supply down !So can that measurement be in error, if not change the heater unit . If the measurement is in error the only likely thing is a curruption of the heater control software is my view

JUST FYI Hot end heater if set it for 160 or anything less heats up as it should. When it gets above 161 danger zone LOL So Im thinking if a short then it would give warning from 1 degree. If its temp sensitive when some part heats up spmethin stops because heating stops rising and few sconds later "heater Failed Printer Stopped Please reset" I think Ill order new heater barrel

Hi I am not sure about the ender 3 but the marlin software on my Saffire pro has a safety feature which checks the rate of change of the nozzle temperature and if it goes outside a given range gives a similar error to that you are seeing in my case err7

Latest I had noticed from yesterdayI had Ohm meter set on 200k. So today I change meter setting to 200 ohm AND i got a reading of 19.5 ohms So now Im thinking wires close to heater block causing them to move or shift??? Have to look into

well I'd swap the heater cartridge anyway, they're cheap.

Also did all this start when you fitted the new thermistor ?

Always look for 'cause and effect' when trouble shooting.

Could be incorrect settings in firmware, or just dodgy parts.

These two feel Metalic like crimped wires. Pulled apart have same resistance of 19.5 ohms. I can imagine that close to heater they heat up a bit and move closer? I have some tapcan tape Im going to put a piece between those two. And in answering your question did this start when thermistor was changed? NO, I changes thermistor thinking it was the culprit. It started lil after changing 235 x 235 carriage bed to 300 x 300 but still used smaller bed heater (235 x 235) for the time being as didn't yet haf full size heat bed

Silly suggestion have you tried to turn the bed plate temp right down ,!!

Well that wasnt the cause WTF I had the bed set for 60 and noxxle 203 failed shut down restart JUST nozzle heat to 160 and at 158 Failed

im Thinking on ordering a new heater cartridge new

Okay using homesian deduction.

Problem started after major hardware change.
logical deduction: you caught or damaged something during the operation.
conclusion: replace the non-functioning part - carefully :-)

Ordering Now new hot end assembly

Just ordered be in the 14th Keep fingers crossed My moms family going way back from Cornwall, Mt St Michaels

so instead of just changing the heater cartridge.
You're going to change the entire hotend assembly ?

Or just use the cartridge that comes with the hotend assembly ?

I'm still of the opinion that it is still a Firmware issues everything thing else feels like fairies at the bottom of the garden but then I've been wrong before so it would not be the first time.

I ordered a heater cartridge with new thermister, heater, heater block, Thoat pipe, heat sink, boden tube. Whole assembly except for the fans. These assemblu is due in Monday. If this doesnt work then the SKR 1.4 board going in. the firmware file on a micrSD card that came with printer is useless. I used same MicroSD card to transfer gcodes from computer to printer in the begining. Plus the stock board not having a bootloader < i dont want to have to purchase something else just to load firmeware.

wELL THE NEW HOT END ARRIVED YESTERDAY I thought I'd install today and now no matter what temp set nozzle for I get this message All new wires, didnt change anything on new hot end NO MATTTER WHAT I SET NOZZLE TEMP FOR 200,60 , or even 20, I get that message GRRRRRRRR

PS Bed heats up like normal. NO ISSUES

YAHOOOOOO Loosed up new thermister screw just a little after asking yT what can cause that message I love YT

It would appear from your last post that you didn't have a screw loose, either between the ears or in the heater block, but rather a screw too-tight! Good find.

it was too tight from a NEW hot end