Hotpoint always cool wash

[jwt]

Hi

Have a hotpoint Aguarius 1200 WM64 washing machine which is not using hot water in 95deg prewash nor is it appearing to heat the water during warm washes.

Have swapped the leads from the cold solenoid to the hot and the hot sonoid is fine plenty of hot water.

So I think it must be a thermostat problem.

So the big question is where are the thermostats located, how do you get at them and how would you test them?

Many thanks in advance.

John

[iadom]

Re: Hotpoint always cool wash

Most prewash cycles use cold fill only. If it is not heating then after a set period of time the control unit will move the timer onto the next cycle. The temperature is controlled by an electronic device that is fairly reliable, there is no ‘thermostat’. A faulty heater or related wiring is more likely to be the cause.

NB. The heater on this machine incorporates the temp controller, but heater replacement is not easy. removal of the original can be difficult.

[Penguin45]

Re: Hotpoint always cool wash

John,
The machine does not use thermostats to control temperature, it uses a thermistor circuit.

Prewash is cold fill only.

The symptons you describe can be one of two things :
Heater failure/out of circuit (broken wiring).
Programmer failure. Difficult to check but if heater OK it’s about all that’s left.

Check hot valve function by selecting 95c (C?) wash (no prewash); water should come through the right-hand compartment of the soap drawer.

Heater is part number 1602026, programmer is 1603787. Prices from spares@ukwhitegoods.com if required.

If you are going into the machine, power off please………

Regards,
Penguin45

[jwt]

Re: Hotpoint always cool wash

Hmmmmm……………….

Tried it with just the 95deg, wash and no hot water.

I take it the heater assembly is buried under the drum?

Can I check resistance in the heater, preferably somewher up top? I assume the wiring comes up to the control board. I have searched but there doesn’t seem to be wiring diagrams on the net 🙁

Thanks

John

[kwatt]

Re: Hotpoint always cool wash

John a hot/cold fill is normally a bit of a con really. I’m not sure about the Hotpoint WMA series but most of them only fill with hot on the first fill after the pre-wash. Some of the older Hotpoint and Hoover machines supported a mixed fill but I don’t think that newer ones do.

For the record, I think we’re now the only European country that actually has a hot fill valve at all!

Essentially it’s cheaper and more efficient to heat the water in the machine as all you do is remove the cold water lying in the pipework, by the time that’s in the machine is full. And on most machines you won’t feel much, if any, heat in the door glass on the majority of programs.

K.

[Martin]

Re: Hotpoint always cool wash

On reading jwt’s first post on the subject, I don’t believe there is anthing wrong with his machine 😕

If the heater were at fault the machine would not complete the wash cycle. It would just stick on the main wash all day long instead. If therefore it completes a full wash cycle (wash,rinse,spin) there’s not problem to solve!

Martin

[admin]

Re: Hotpoint always cool wash

The WM Range if the heater or wiring is open circuit it will carry on through the programe if there is no rise in temperature detected by the control unit in a given time slot, the only way cust will realise is by poor wash results or temp prob’s aslo if the economy button is used this will create same problem.

[jwt]

Re: Hotpoint always cool wash

We are getting through a full wash cycle fine, complete to the end.

However clothes are poorly washed, water emptied from washer is cold, no wash cycle utilises the hot water feed. (even when the water has been run before hand so that there is hot water up as far as the feed from main plumbing so that there is about 4 foot of hot water pipe with standing cold water in it)

Looks like I going to be buried up to my elbows in a washing machine figuring out how to get at the water heater element 🙂

John

[kwatt]

Re: Hotpoint always cool wash

John,

Please understand that the final rinses are all done on cold water so the drained water will therefore be cold, pre-wash should be cold fill as well. In most appliances, there is only ONE hot fill and most programs will not use a hot fill, it’s too dangerous. Many modern garments are designed to be washed at 40C, at that temperature the incoming hot supply could be hotter, a lot hotter, so it could ruin your clothing. At that temperaature you are highly unlikely to feel any heat in the door glass. Also the detergent you use is not designed to be immediately fired into hot water either, so it won’t operate as it should.

In other words there’s a lot more to getting decent results than just the mechanics of the machine employed to do the wash.

When you say that the clothes are poorly washed what, exactly, do you mean by that?

K.

[jwt]

Re: Hotpoint always cool wash

Thanks for all the replies 🙂

By poorly washed I mean stains, grease etc left behind.

Stripped the machine down and got access to the heater element assembly

Looking at it from the front there are 5 terminals

1 Large main feed to heater
2 Black connector terminal 1 (Thermistor?)
3 Black connector terminal 2 (Thermistor?)
4 Earth
5 Large main feed to heater

1 and 5 the heater itself from the look of the connector are O/C
2 and 3 read about 16k Ohms

So looks like the heater is cream crackered 🙁

John

[Penguin45]

Re: Hotpoint always cool wash

Thermistor reading is within tolerance – you get a new one supplied with heater kit anyway. P/no is 1602026 – PM to spares@ukwhitegoods.com will get things moving for you.

Regards,
Penguin45.

[jwt]

Re: Hotpoint always cool wash

Thanks for everyones help.

Great forum

Will send mail with part no.

I note you don’t ship to RoI and she who must be obeyed want it fixed asap.

Regards

John

[iadom]

Re: Hotpoint always cool wash

kwatt wrote:John a hot/cold fill is normally a bit of a con really. I’m not sure about the Hotpoint WMA series but most of them only fill with hot on the first fill after the pre-wash. Some of the older Hotpoint and Hoover machines supported a mixed fill but I don’t think that newer ones do.

For the record, I think we’re now the only European country that actually has a hot fill valve at all!

K.

Hotpoint WM models, Prewash=cold fill
95° and 60° =hot fill
50°, 40° and 30° = mixed fill

jwt. take care when removing the original heater, not easy, be careful not to damage the nylon drum front and watch the chassis edges, they are very sharp. Also make sure you transfer the thin stainless steel plate from the original heater to the replacement. ( with the mains plug removed of course)

NB. I did mention in post#2, after reading the first post carefully, that this machine will advance to the end of the cycle if the controls do not register a rise in temp after a set time period. 😉

[Dave_Conway]

Re: Hotpoint always cool wash

jwt wrote:Will send mail with part no.

ROI isn’t a problem John, and there’s no need to email me

I added it to the shop here to speed things up, I can send one Monday if required 😀 :

http://www.ukwhitegoods.co.uk/modules.p … cts_id=357

Dave.

[jwt]

Re: Hotpoint always cool wash

Great stuff will order this evening!

Anyone know how you remove one of these from the drum?

There is central nut which I have removed. I can now slide the heater element out but the rubber gasket has a plastic or metal flange behind it which the nut tightens the front flange of the heater against. The inner flange appears to be bigger than the hole!

So Nut – – Metal flange – – Drum – – Rubber gasket – – Metal/Plastic flange

I dont want to go to hard at this in case I damage or mark the hole in the drum and cause it to be impossible to seal.

Any thoughts

John

[Author]

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