Indesit Washer Dryer not drying

[davecross]

I have an Indesit Washer / Dryer PWD8148S
Just over 1 year old and has developed a fault just after guarantee ran out.
No heat on dry cycle.
TOC is operative – it has 30ohms across it. If I remove it a Fault code appears after about 10 mins.
Fan comes on and off and I can here the fan rotating. I also see 240V across the terminals when fan on.
Wiring to heater and fan looks good. I have checked connectors.
No 240V at heating terminals at any time during drying cycle.
Condenser reservoir is not blocked.
I am now stuck. Any ideas. It sounds to me like an output triac feeding the heater has gone.
Heater terminals have about 35ohms across them.

[Martin]

Re: Indesit Washer Dryer not drying

davecross wrote:TOC is operative – it has 30ohms across it.

It’s not a TOC by the way but a thermistor (a.k.a an NTC) the resitance value of it measured in kOhms not ohms. Try replacing that first, if not the main control PCB is the next suspect. 🙁

[davecross]

Re: Indesit Washer Dryer not drying

Thanks Martin.
Do I read from your reply that this model doesn’t have a TOC?
Do you know what resistance should I expect from the NTC Thermistor when cold say at room temp 20C?
Are we talking of the same unit. The one I removed to produce the fault is the one with 2 thin blue wires at the front of the machine near to the blown air inlet to the drum.
What resistance value would I have to put across the 2 terminals to force the heater on to test whether the thermistor is at fault?

[Martin]

Re: Indesit Washer Dryer not drying

Yep its an NTC for sure though I dont know what the room temp reading would be but I’m guessing something around 12kohms?

[BobHope]

Re: Indesit Washer Dryer not drying

it 20koms at 20c.

Bob.

[davecross]

Re: Indesit Washer Dryer not drying

Thanks Martin and Bob.
It is reading about 30 ohms so I guess the controller thinks it is too hot as it’s an NTC which fits the symptoms.

So what I’ll do is temporarily wire a 47k across the terminals and see if heater comes on during the cycle.
If it does I’ll replace the thermostat.

Of course I’ll switch it off immediately once I know it’s working as I don’t want it to overheat.

I’ll let you know what the outcome is.

[Firestarter]

Indesit Washer Dryer not drying

Take a careful look at the thin blue Ntc wires where they are cable tied to the cabinet at the top. I have found a few have broken by the tie. Give then a little tug – they may well be held in place by the plastic only with all the copper conductors snapped inside.

[BobHope]

Re: Indesit Washer Dryer not drying

if the wire is open circuit it gives an f13 fault code.

Bob.

[davecross]

Re: Indesit Washer Dryer not drying

The wires are not snapped. If I open circuit them I get the F13 fault code after about 10 mins.
Upon removing the NTC thermistor the contacts read 19ohms so I’ll get a replacement.
I’ll let you know if this fixes it.
I’ve ordered C00083915 Indesit NTC Thermistor. Even though my model is not listed it looks like the one I need.

[davecross]

Re: Indesit Washer Dryer not drying

NTC Thermistor arrived yesterday. It reads 20k at room temperature as expected.
Fitted and now dryer works.
Thanks everyone for your time and effort. 😀

[Author]

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