GHD 4.2b Repair of thermal fuse and thermistor 

Excellent video. Love that you show all the components that are worth checking. Thanks!

Thanks you. You are the BEST. Your video is perfect . ,

This is great video. Could it be a dodgy switch as when you flick it on sometimes it comes on for split second then goes off?

Hello Bravo. Great job. I saved a lot of money Thank you I am French

Thank you from Spain. good job

I received a straightener, it is the same as the straightener you repaired, I just want to ask, how many kiloms or ohms is the thermal resistance? I measured it as an open circuit and the values ​​above it were deleted.

Olá kelvs Meu nome é Nilton Estou aprendendo concertos mas fico perdido em algumas coisas Trocar fusível Indentificar componentes em curto Mas sou calmo devagar eu consigo Parabéns por seu trabalho 🙏

Welcome back. Nice watching you do that repair. I missed ordering stuff from Banggood based on what you ordered for your various construction projects. :-) Will you be buying and using some goodies again soon in your videos?ThanksSage

Io ho su 2 piastre uguali il fusibile rotto e il termistore che misura 100kohm circa e che varia resistenza al valore della temperatura deduco che sia sano, perchè allora si è bruciato il fusibile????

Hello Kev and many thanks for this excellent video, I have read (or at least I think I did) all the comments and answer but I can't find where get the thermal fuse, do you have a specific of this? i.e. at what temperature should it break. Ebay would be nice, thanks a lot

Few questions please. 1. Can i use regular tool box solder to solder the cables of the thermistor to the circuit board? 2. What Ohm should be showing when testing the thermistor? 3. Can i use regular computer CPU thermal paste when fitting back the plates?

hi and thankyou for the great video! i followed your advice and went into the thermal fuse compartment, found out that a white thin cable is loose. where do i attach it please? sorry total newbie here! how can i send you a photo please to advice me?

Great Vid Kev. Checking my non-working GHD 4.2B shows that the thermal fuse is us and will be replaced but, checking heating elements shows that the heating elements on each side is 71 ohms and not half of that value as shown in your vid. Is this ok? or, does it suggest an additional fault? Keep up these helpful vids - we amatuers would be lost without them

hi kev great vid by the way what is the name of the mega board you used to make your chip tester?

Hi Kev thanks for the tutorial a quick question what is the past called that you put under the heat plate?

Thanks for this video ! I have got an issue with replacing the heater- switch side on Mk5. In fact, for the 2nd Time, when I replace it and test it, it breaks, it seems there is a short circuit somewhere ( black burn trace localized at the breakeage zone) , an idea please? Thank you

Could it be the thermal fuse that's causing it to cut off after a few seconds? My wife's ghd 4.2b stopped working so I took them apart, cleaned contacts and it worked for a few seconds then packed in again

Thank you video was easy for following for beginners.Awesome thanks Kev.

hi, i have GHD 5.0, have replaced thermal fuse because it was broken, but now when turn on i listen beep and only one resistor is warm, the resistor near termistor is cool. What i can check ?

Hi I have a ghd platinum that doesn't heat up and there is a red light that just flashes, what do you think is wrong with it and can I fix it?

Hello. Can you repair FHI HEAT flat irons as well?

Bk again sorry i hope you don't mind me asking what is the arduino setup you created to test the 8 pin pic or ic actually doing ??And do you know what thermistors are in the original GHD using are they glass or smd or even the glass type ?

Thank You 🍺

hi i have mk5 , it don't turned on, then i changed the PCB , but i think is the fuse the problem, i have a question, if one fuse ore i don't plug the fuses , the led will turn on or i need to plug the fuses too for see the led on? cause the led don't turn on anyway i changed the pcb , the cable is ok, thanks

you can reset some thermal fuses with freezer spray.

Great Job! by the way, I supply the heating element for hair straighteners, welcome inquiries!

hi kev whats the board underneath this one Arduino mega 2560 called?

hi, I have a hair straightener GHD 4.2 B Jemella European version at 230Volt. The problem is that it doesn't turn on. I have text all, the 2 resistors of the plates, the fuse, the NTC thermistor marks 140Kohm at room temperature, the switch, the rotatable connector of the cable, the two 70 ohm minimelf smd resistors, the diodes, etc. etc. everything is OK. The T4D 560 triac has on one pin the voltage to supply the plates, while on the other pin, it has nothing. Could it be that IC 12F675 does not send the signal to the triac because it is faulty or should be reprogrammed ??

also what is a 100k beater?

Can't hear too well

How can i make my silicone adhesive soft i tried heating it in a pan, i want to be able to put a blob over the thermistor and have it run down the sides itself, im onto my 8th attempt even purchased the same stuff you have ?Please if any one has any ideas i want it more like a pouring type silicone, it just sits like a blob LOL..

Thanks for the video, strangely (or maybe not) my 4.2b PCB has a slightly different layout to the one on the video. What would a good reading be for the thermistor?

Hello, I have the same issue with the glass thermistor MF58, I didn't hear quite well in the video. could you please tell me which was the recommended thermistor's value?

Have identical Straightener, one side not working. But, to much work, not worth it, I got a new better one, second hand ceramic GHD, for about 25 bucks incl. shipping.

Hi can you please help me ... I have a ghd Mk5 model I replaced the thermal fuse and it's still not switching on I tested the resistors R8 and R11 they were fine i tested the plates they were fine i tested the main cable that's fine so i can't see what else can be the problem .. Will you please be so kind to give me advice at what else might be the cause cos now currently it's not switching on no beeping sound nothing I checked everything that are usually the problems PLEASE HELP ME.Thank you for your videos 😄🥰

Hi kev can i send a set of ghd 5.0 to you for repair cheer's

Kev thanks I have used this video 4 times in the last 5 years to fix multiple straighteners.

Very good video I have ghd 4.2b, suddenly stoped working and changed the normal fuse plug to start with no joy. Than I tested the thermal fuse reading was coming 3 to 5 ohms, heater element reading was 70 ohm when disconnected from pcb as they in parallel. Changed thermal fuse it come to life again, so happy thank you Kev

It's me again Kev, I temporary bypassed the thermal fuse just to see if it was turning on and it did. Unfortunately I see the led blinking and a sound coming from the buzzer at regular interval. I've disconnected from 1 side the thermistor and it says 110K (seems ok). I hope is not the PIC. Is the thermal fuse working like a normal fuse but with temperature? I mean, the bypass I did could perfectly simulate the TR? Many thanks

Vic Hi Kev my granddaughter has a GHD 4.2b and when she plugs in it beeps . I managed to open it and found that R11 is burnt out could you please supply me the one and could you tell me what other component I would need to check to get it working or if you give me your address I could send it to you for repair.

Any tips on how to fix a flat iron that gets WAY too hot? Its a chi and it has a temp gauge button that goes from 330° F to 410°. Ive had it for a year i think and suddenly it gets so hot that i cant touch the outside of it

Could you please help me solve the following? I got a Remington hair iron model 9509. It starts and then stops after mild heating. Thanks.

Is it just worth replacing the replacing both the thermal fuse and thermistor to be on the safe side? I've got my wife to repair...

Great video I managed to fix the my wife's straightener but I can't seem to get the plates to heat the same...one plate is warm while the other is hot

Hi wonder if you could help never used an ometer before. what setting do I put it on. Thanks in advance.

While changing the fuse I broke the silver clip, can you buy a replacement silver bracket model 4.2B?

Hi when putting back the heater plate when applying thermal paste do you need to apply heat to it in order to set or do you leave it just like that ?

Thanks for the video. Regarding the thermal fuse. What value should a working thermal fuse provide at room temperature? Mine is reading 0 ohm. Not sure whether to replace.

Hi, I have a v5 and trying to figure out what is wrong. I have checked everything in this video (the fuse, the heaters, thermistor, and resistors). Everything seems ok. Nothing looks burnt. If i turn it on, everything seam to work, but the heaters don't get warm. Not sure what I should test next. Any ideas?

Great thank you! I'm looking to buy a thermistor for ghd 5.0, I didn't understand very well which one should I buy, could you help me please?

Hi Kev, great video thank you!, I bought a kit, replaced fuse and thermistor (thermistor came attached to a heat plate. Heat pad works on fuse side but not thermistor side. I connected original heat plate and new heat plate from kit with new thermistor and neither of those heat up either. Any tips to resolve this would be much appreciated.

Very helpful video. On my 4.2B straighteners it appears the thermal fuse failed due to the thermistor debonding from the heater. The thermistor measures just under 100Kohms - can this just be stuck back down or safer with a new thermistor? Also do you recommend a specific type/brand of thermal fuse? Thank you

hi Kev another great video. I have tried to replace the thermistor on a 4.0 and 4.2b after heater plate and fuse blow but when switched back on temp shot up to over 200 degrees C is this the chip or is it something I did wrong? can you advise. Thanks andy

Would a reading of 0.04 ohms across the thermal fuse show a faulty fuse?