Whirlpool ADG 7440 start 4 beeps + flashes 30 sec pump run

[ploane]

Hi
I have a Whirlpool ADG 7440 (8542 440 15810) about 6-7 years old which at program start now does the following

beeps 4 times and repeats
displays a flashing (warning) light
runs the drain pump for 30 seconds and then stops

I have removed and cleaned filters from central well and can see black grill in well is clear.
I noticed a previous post which seemed to be on same issue (only 4 flashes described however). This got response that no drain was detected in time allowed.

http://www.ukwhitegoods.co.uk/modules.p … ht=adg7440

When pump runs the well is drained via an opening at about 7 oclock on well circumference. This returns once pump stops

If that is the case here what is the cause ? And how do I fix it ?

Thanks in advance

Peter

[clivejameson]

Re: Whirlpool ADG 7440 start 4 beeps + flashes 30 sec pump r

The water ‘returning’ to the sump is quite normal…the drain pump requires a head of water to pump so it will drain down to this level, the remaining being held in the drain pipe until the pump stops when it runs back in so nothing to worry about there.

….and yes, 4 flashes is no drain in time allowed so it would be worth checking the level switch again (behind the black grid). For a full inspection it might be better to remove it altogether, it’s a twist fit from underneath.

Power off at all times please :zap:

[ploane]

Re: Whirlpool ADG 7440 start 4 beeps + flashes 30 sec pump r

Thanks for the reply
If possible I would like to get more info before going near machine which is built in with (I’m fairly certain) plug behind machine, and will be a struggle to remove, based on how the rest of the kitchen was installed.

Can you give more detail regarding location and function of “level switch” ? Is it monitoring water level ? or machine level ?

When you say check it again what am I checking for ? I have not checked it previously as I was not aware it existed behind grid

Can the black grid be removed ? If so how?

This problem has appeared and disappeared and now is back again in case that is somehow relevant.

If it is the level switch, what is the approx cost of a new one ? and is it an easy fit (sounds like it) once machine is out ?

Replies appreciated

[clivejameson]

Re: Whirlpool ADG 7440 start 4 beeps + flashes 30 sec pump r

You’ve seen the black grid in the sump, behind that is a rubber diaphragm and behind that a microswitch. Yes the black grid will come off but only when the whole assembly is removed…this is a quarter turn twist fit from underneath. It is possible to remove whilst the machine is in situ but if it’s plugged in behind then you’ll need to turn the house supply off to isolate the machine if you’re not going to pull it out of the housing.

If you do pull it out you’ll find it’s generally not that difficult and this will give access to remove the base pan which makes the job a whole lot easier!

Once the assembly is removed it can be carefully taken apart for inspection (cleanliness and operation of the switch etc)

[ploane]

Re: Whirlpool ADG 7440 start 4 beeps + flashes 30 sec pump r

Again thanks for the additional information
Yes I will be fully isolating the machine before attempting any work on it.

Can you clarify one point in your last mail. You say the black grid will come off but only when the whole assembly is removed; then that it is possible to remove while the machine is in situ ?

Is it the assembly that is possible to remove while the machine is in situ OR the black grid ?

If it is the assembly do you mean you can reach under somehow to get access to it ?

Or is it possible to remove the black grid from inside the machine and clean inside with any prospect of success ?

Apologies for repeat clarification request, but I would like to have all info clear before starting to work, and have not worked on dishwashers (yet 🙂 )

[clivejameson]

Re: Whirlpool ADG 7440 start 4 beeps + flashes 30 sec pump r

you will not be able to remove the black grid only until the whole water level switch assembly is removed from the sump underneath. Once you have the assembly out you will see how it clips together 😉

[ploane]

Re: Whirlpool ADG 7440 start 4 beeps + flashes 30 sec pump r

Thanks
That clears that one up

With regard to the switch, what am I looking of when I have it removed to determine the problem with it ?
Will a clean fix it ?
If a new one is required do I need the whole assembly ?
Where can I locate part nos and prices etc ?

[Penguin45]

Re: Whirlpool ADG 7440 start 4 beeps + flashes 30 sec pump r

Replacement water level indicator is HERE.

The diaphragm works the switch, if it gets clagged up, it doesn’t. The switch is a “light action” microswitch – the spring mechanism in the switch can fail.

Penguin45.

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