Hot & Cold Fill machines Hot never draws water

[DIWHY]

I've had 3 machines now. Each plumbed with hot+cold feed pipes.
But none has ever drawn hot water from system.

I know because the hot feed pipe has never even got warm on any wash cycle.

I thought it was such a waste letting the machine heat it when I had a tank full.

Why wouldn't the machines draw hot when its available?

The pipes are clear, water runs when disconnected
The machines were /are all new
So the machines must decide not to draw it but why
And if they are cold fill machines then why have 2 conections

Sorry so many questions but it gives a clearer picture

 

[breezer]

not thirsty?

i suspect they do use hot water but you do not realise it. i say this becsue there is one thing you have not said hapens, which would happen if they didnt use hot water

 

[bathjobby]

Read the instructions; What you usually find is that there are all sorts of wash cycles up to and including a 60C wash and they all take in cold water only. There are also one or two cycles which run at anything up to and around 90C (intensive wash for whites, etc) and only these high temp programmes will actually take in hot water. After you've read the instructions and found which progs these are, you can prove this by selecting these progs and either opening the powder draw and sticking your hand under the incoming water (oh, lovely and hot), or if you turn your hot water inlet off with a cycle that requires hot in, and then observe that the cycle won't run because the required hot water in, is not available.

 

[breezer]

i disagree with the first bit.

most take in both and only hot at 60 ( but i guess times change) perhaps fido can clarify

 

[bathjobby]

You disagree, but you don't really know, and ask for clarification, Uh ? When I post here it is based on what I know or have experience of and in an attempt to aid the person with the problem. On that basis, what does this negative, unsure, post help the enquirer with ! Lets await their response !

 

[sandwell]

We use our machine on cold fill only.

 

[fido]

On older machines you can often trick it into taking hot by selecting a 95 degree wash, waiting until it has finished filling, then turning the dial to a 40 degree wash or whatever. I've tried this on modern Hotpoint WMA machines but they run the drain pump for a while at the start of the new programme so they throw away all your nice hot water. This is another reason why new machines take up to 2 hours to do a wash.

 

[breezer]

You disagree, but you don't really know

i disagree because i used to work for hp as a service engineer, fixing w/m everday, however that was some 10 years ago and things change, but then a m/c used both hot and cold to fill, as does the m/c i have in the kitchen here. i asked for fidos clarification as i know that he works on most brands now

 

[DIWHY]

Thanx Guys, my firstpost and great replys.

? How can these new machines splash all this energy saving blurb about when they waste energy heating icy mains water whilst there are gallons of hot available.

 

[pipme]

My Neff H & C fill (around 10 y/o). I run sink hot tap to prime hot water pipe prior to use, otherwise, will pull cold from hot pipe for a while .. When running up to 60° washes, hot intake is used to merely raise water to 20° before wash cycle begins... Cycle takes an hour, wash rinse. etc.
The 'element' heats for surprisingly very little time -- One can check the temps by turning the separate temperature control listening for the stat clicks.
Have not checked for higher temperature washes. I am guessing 20° C as the common base for the wash cycles.
Doesn't the modern machine data specify the Kw usage per wash or cycle? I have seen some pretty low figures I am sure. around 0.85 Kwh / cycle... cold fill.
P

 

[fido]

Modern machines heat the water quickly because they don't use much water, sometimes only about half a gallon. Unfortunately that is not enough water to get things properly clean. Performance has been sacrificed in order to be environmentally friendly. Most people don't do things like running the tap until it comes hot before starting a wash so, with a small volume of wash water in a modern machine, chances are it would still be running cold when it completes filling.

 

[pipme]

If we load our M/C as per the book, whites and blues are quite luminous .. we are very pleased with the performance .. BTW it uses little water for the wash cycle too, if of course the water depth pressure tube is kept clear of sludge and working efficiently !!

P

 

[DIWHY]

Hi Fido
I tried to test if the machine would use the hot water if the feed had been primed.

But you've probably guessed, once the feed pipe is primed it is hot so I can't tell if the machine then goes on to draw hot water.

So I think from all of this that new machines don't draw domestic hot on cycles below 60

 

[fido]

You would need to feel the actual hot hose to the machine to know if it is using hot water.

 

[pipme]

Is it using hot water ?

Feel the port 'window'.

Open detergent drawer whilst filling.

When fill completed, using separate temperature selector if fitted .. turning down listen for 'click' where 'call for heating' would be switching off, turn up til 'click for heating required' is heard, between these settings will be the actual water temperature within 5° C or so from the MC's point of view .... That is if the damn thing clicks !!

P