Siemens Extraklasse not heating

[Angler]

Any advise on rectifying my Siemens D/washer heater problem.
On any of the cycles the water is not getting hot. tried a reset, which has made no difference.
I’m guessing it’s the heater (anyone know what resistance value I should get once I get to the heater).
Not had it apart before, but presume the heater is in the based and it’s an ‘on the side job’.
I will also check the thermostat, if someone can point me in the right direction 🙂

Any and all help greatly appreciated 8)

The numbers on the door are E Nr SF24261GB/08
Typ. SD13GT1S
101111603246759450059

[nomadPaul]

Can you see an FD number on the door etching . This would give us the manafactured date. It would poss be something lik 81xx .

There are normally 3 reasons for non-heating –

1) Lack of water in appliance – Low water levels will stop appliance from heating as heater pressure switch needs a certain amount of water before it will allow heater to operate.

2) Burnt out contact on heater relay on main control board –

3) Open circuit water heater – normal resistance is approx 29 – 35 ohms

I’ve listed these faults in order of probability

1) You will need to check the pressure chamber and ribbed hose , located on the bottom left hand side for blockages . If you get a ‘kerdonk kerdonk’ noise on fill or there’s no water covering the base once the machine is up and running , then this is the probable cause. Cleaning out these two places could cure it.

2) You will need to remove the module and examine the circuit board – the burnt out joint will be quite obvious . If this is the fault , either a new board is required OR some independent engineers will attempt a soldered repair.

3) Open circuit heater is most definitely the worst scenario of the 3 and is a nasty job even for experienced engineers –

If its 1 or 2 , then it may be worth a go but if its 3 then you’d be better getting someone in or replacing the whole machine

POWER OFF AND PLUG OUT IF INVESTIGATING

[Angler]

Re: Siemens Extraklasse not heating

nomadPaul,

Thanks for the reply

The FD number is 8111

I’ll go through the three reasons tonight when I get in

[nomadPaul]

no worries….

For your information , an FD of 8111 means its just under 8 yrs old

[Angler]

Re: Siemens Extraklasse not heating

nomadPaul,

Checked all three,
Heater resistance 28ohms (I’ll check this again tomorrow with a mega ohm, just to be sure – forgot to bring it home :rolls: )
Pipework appears clear/clean and the unit fills up ok.
The heater relay on the ciruit board had one overheated solder joint and two very suspect ones. This looks like the culprit, so taking it into work to get our instrument engineer to check it out, probably needs a new relay, rest of the board looks ok.
I see what you mean about the heater, on first inspection it looks like a cartridge type heater but not in the easiest place, I’m sure they could have designed that a bit better – but hey design engineers seldom think about service engineers eh 😉

[Angler]

Re: Siemens Extraklasse not heating

nomadPaul

All fixed and working properly and all thanks to the excellent advice from yourself 😀

It was the heater control relay on the circuit board

42pence and 6 quid p&p – 2 days from USA (did’nt want to wait for RS to get them in) ~ definelty cheaper than a new board.

Thanks again 😀 😀

Angler

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