Indesit ISL70C(EX) no heat and flashing lights.

[flyboy-uk]

Hi folks,
I hope some bright spark can help me with my poorly tumble dryer!
It runs for about 10-15 seconds then the empty water light comes on and the machine stops, after a second or two the high heat light and the empty water lights start to flash and the on / off light flashes rapidly – the drum starts to turn again but never stops or reverses. At no time does the dryer produce any heat.
The condenser is clean, I have checked the float switch and float, the pump is running.
The machine does the same thing on timer dry, sensor dry and cool tumble programs.
Thanks in advance for the help!
Cheers.
John

[helo_75]

id be checking the thermostats over the heater first

plug out, banjo shaped rear panel off, the thermostats are over the heater

other than that, left to right, first light being 1, which order are they flashing ( i.e 2 and 4, or 1 and 3 etc)

hopthis helps

[flyboy-uk]

Re: Indesit ISL70C(EX) no heat and flashing lights.

Hi,
Thanks for the help.
I have checked the element and the stats at the back and the one at the front of the machine – these are all ok.
I’m left with the conclusion that the circuit board is faulty.
The flashing lights are numbers 3 and 4 counting from the left.
Cheers.
John

[helo_75]

its f03

thats the ntc faulty

does it have 3 thermostats over the heter or just 2?

[flyboy-uk]

Re: Indesit ISL70C(EX) no heat and flashing lights.

Hi,
Problem solved – the dryer is working great!! Yippie!!

F03 is the front NTC – I had initially measured the resistance on the NTC itself… as it turned out it measured open circuit when measured at the plug the PCB end – so it was only a cable fault; a couple of lengths of suitable cable and some crimp connectors – job done!!

The following info might useful to some folks out there:-
Note:- The front NTC connects on the top edge of the circuit board – plug with two orange wires. The element and rear NTC are connected on the right hand side of the circuit board – this plug has 5 wires Blue, Orange, Brown, Red and Black.

1) The front NTC measures approx 500k ohms.
2) The rear NTC measures approx 500K ohms [red and black wires on the plug]
3) The resistance between Orange and Blue Wires is Approx 46 Ohms [This is one half of the element]
4) The resistance between Orange and Brown wires is Approx 46 Ohms [This is the other half of the element]
5) The resistance between the Blue and Brown Wires is approx 92 Ohms [This both parts of the element]

My machine has 2 devices above the element, one is an NTC the other is the safety cut-out. The safety cut-out is connected in the orange wire to the element common connection.

The resistance of the NTC’s varies with temperature – so you may not get the figure I have quoted. The resistance reduces as the NTC warms up; if you remove the NTC connect it to an Ohm meter and warm the flat metal side with your finger you’ll see the resistance go down – the drop wont be dramatic [after all your finger is not that hot] and is easier to see on a digital meter.

Measurements taken with the plugs disconnected on a digital meter… and don’t forget folks MAINS PLUG OUT FIRST!!!!

Important…. there are some different versions of these dryers, so different readings may be obtained.

Thanks for your help.
Cheers.
John

[helo_75]

WRONG!!!

if it has 2 stats over the heater, neither are an ntc

one is cycling stat, the other a one shot

im glad you sorted it, but if your going to offer advice to others, makes sure its at least right

thanx

[flyboy-uk]

Re: Indesit ISL70C(EX) no heat and flashing lights.

I hate to disagree with you… but….

This dryer definitely has an NTC thermistor fitted above the element together with a safety cut-out! [by the way, NTC stands for ‘negative temperature coefficient’ which means that as the temperature increases the resistance decreases]

I think you’ll find fault code f13 would indicate rear THERMISTOR open/short circuit

I used to have an older indesit dryer that did have a ‘cycling stat’ and a one shot cut-out, so I do know what you’re talking about… but like I said my dryer does have an NTC thermistor.
Presumably, if you fitted a ‘cycling stat’ in error you’d get f13 indication as the ‘cycling stat’ resistance would be near zero when closed.

Having a thermistor gives the electronics a more accurate measure of the temperature as the resistance directly relates to temperature over the operating range of the thermistor – quite why computer controlled electronics were deemed necessary to run a tumble dryer……..

Also, there IS a rear thermistor listed for this model.
I suspect there are some variants on these Indesit dryers which would lead to some confusion. […just looked on Partmaster – there is bunch of DIFFERENT thermistors / stat kits etc listed for the ISL70C so clearly there ARE some variants]

If you’d like to come and see my dryer for yourself tea and biscuits are available!

Cheers.
John

[helo_75]

ok, we’ll do this

ive been an engieer for 22 years

dont teach your grandad how to suck eggs sunshine, it aint recommended, ok?

being a member of the trade section, and of course being a fully qualified engineer for a major uk retailer, im not sure you telling me fault codes is relevant

ill say this once more, and this is fact.. it hasnt come from someone who hadnt go a clue and stumbled across a website and got lucky to find a broken wire

IF the machine has TWO thermostats on the back, then thats what they are THERMOSTATS, a CYLING stat and a SAFETY CUT OUT.. no ntc was fitted to that particular section of the dryer

if thats the case, the NTC was fitted to the front of the dryer, which you somehow managed to find

that might well explain why f13 wasnt shown – BECAUSE THERE WASNT ONE FITTED ON THE BACK

i see 2-3 variants of that dryer daily.. there is NOTHING you can tell me about it, or any other variants

i wont post again, and im sure youll retaliate.. people read this forum daily.. and feeding them wrong information is both dangerous and silly

[Specialist01269]

Re: Indesit ISL70C(EX) no heat and flashing lights.

Listen to Hello mate he’s spot on: 2 stats above heater, then they are as he says. 3 above heater you have 1 x cycling, 1 x NTC & 1 x safety.
Yes that’s what NTC means, but he already knows that, he’s an Engineer & from what I know of him a pretty skilled one.

[Penguin45]

Re: Indesit ISL70C(EX) no heat and flashing lights.

OK chaps, this one has gone far enough.

All posters are reminded that they should observe the FORUM RULES at all times. Any advice offered should be safe and accurate. We have a few talented amateurs who help out on the forums and their help is appreciated. However, the trade members are usually fully informed and have the advantage of technical support either from manufacturers or through the site’s own Trade Forums.

This thread is closed.

Penguin45,
Moderator.

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