No LED No heat, looks dead

phiggles
Posts: 3
Joined: 17 Aug 2018, 19:52

No LED No heat, looks dead

Postby phiggles » 17 Aug 2018, 19:57

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

gary
Site Admin
Posts: 1032
Joined: 26 Jan 2008, 00:44

Re: No LED No heat, looks dead

Postby gary » 17 Aug 2018, 20:19

Looks like the thermal fuse has tripped. Is the thermistor securely attached on the non switch side?

Gary

phiggles
Posts: 3
Joined: 17 Aug 2018, 19:52

Re: No LED No heat, looks dead

Postby phiggles » 17 Aug 2018, 22:11

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?

gary
Site Admin
Posts: 1032
Joined: 26 Jan 2008, 00:44

Re: No LED No heat, looks dead

Postby gary » 18 Aug 2018, 08:31

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

phiggles
Posts: 3
Joined: 17 Aug 2018, 19:52

Re: No LED No heat, looks dead

Postby phiggles » 18 Aug 2018, 09:48

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

gary
Site Admin
Posts: 1032
Joined: 26 Jan 2008, 00:44

Re: No LED No heat, looks dead

Postby gary » 18 Aug 2018, 13:23

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


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