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No LED No heat, looks dead

Posted: 17 Aug 2018, 19:57
by phiggles
Hi guys,
Been reading through the pages and believe i have the 4.1 version. There is no led or heat
-There is power coming in 240v = ok
- The heaters have a resistance of 35 Ohms (as they are in parallel)= ok
-R8 measures 100 Ohms = ok
- Thermister measures approx 100k Ohm = ok
- Fuse seems to read 5.4M Ohm......

I don't know where else to look and test, does that fuse value seem ok?

Any help would be great, Thanks

Phil

Re: No LED No heat, looks dead

Posted: 17 Aug 2018, 20:19
by gary
Looks like the thermal fuse has tripped. Is the thermistor securely attached on the non switch side?

Gary

Re: No LED No heat, looks dead

Posted: 17 Aug 2018, 22:11
by phiggles
gary wrote:Looks like the thermal fuse has tripped. Is the thermistor securely attached on the non switch side?

Gary


I guess I have to seperate the 2 sliding them apart to view?

Re: No LED No heat, looks dead

Posted: 18 Aug 2018, 08:31
by gary
You will need to take the back off the heater and see if you can see the thermistor.

May also be worth just sending them off for repair as if you need a new heater with thermistor and a thermal fuse it won't be much more expensive. See http://ghd.repair/service.

Gary

Re: No LED No heat, looks dead

Posted: 18 Aug 2018, 09:48
by phiggles
Hi Gary,
just had a look, the thermistor is detached from the white plate (i don't know if thats what you call the heater or plate..?)

Will that stop all power including the led? is the anyway to test voltage on the circuit?

Thanks

Re: No LED No heat, looks dead

Posted: 18 Aug 2018, 13:23
by gary
If the thermistor is detached then the temperature control does not work so the switch side heater element overheats and blows the thermal fuse.

Gary