AEg dishwasher, not washing - motor/capacitor?

[chris French]

Hi Folks,

Not been around for a while.

Our dishwasher, AEG Favorit 50700 has stopped washing (as in nothing
happens in terms of water being pumped around. It fills and drains ok)

so I'm looking at a blockage/jamming of the circulation impeller, or a
motor fault I guess. I can here a humming from the motor, and it will
get warm. Would this happen if the motor capacitor died?

Since it looks like such an easy and cheap potential fix, maybe I should
just change it anyway. I an't et to the impeller, without removing th
base or something.
--
Chris French

[Bob Minchin]

Are you sure that it is an induction motor? A physically small capacitor
could well be a suppressor.
Assuming an induction motor :-
A jammed motor would hum as would one with a dead capacitor. You should
be able to pick up a generic capacitor of a similar value on ebay
Search for motor run capacitor followed by the value and mfd

hth

Bob

[harryagain]

"chris French" <newspos...@familyfrench.co.uk> wrote in message
news:Vy4vyaA6...@blackhole.familyfrench.co.uk...

The first thing is to see if the pump motor spins freely. If not, something
is jammed in the pump.
Usually there is access to the pump to clear jams.

If it spins freely and hums, this indicates one of the two motor windings is
open circuit.
If you can SAFELY give the motor a twirl while is is humming, it should run
(in either direction) Only one direction is correct for the pump to work.
All single phase motors need a run winding and a start winding, some
energised only during starting, some permanently energised. The latter is
more usual these days.
The start winding may or may not have a capacitor, if so the capacitor could
be US.
The components can be cheacked if you have a multimeter, ie the
motorwinding, the wiring to it and to a limited extent the capacitor

[Andrew Gabriel]

In article <kqco27$drm$1...@dont-email.me>,

Bob Minchin <bob.minc...@YOURHATntlworld.com> writes:
> chris French wrote:
>> Hi Folks,
>>
>> Not been around for a while.
>>
>> Our dishwasher, AEG Favorit 50700 has stopped washing (as in nothing
>> happens in terms of water being pumped around. It fills and drains ok)
>>
>> so I'm looking at a blockage/jamming of the circulation impeller, or a
>> motor fault I guess. I can here a humming from the motor, and it will
>> get warm. Would this happen if the motor capacitor died?
>>
>> Since it looks like such an easy and cheap potential fix, maybe I should
>> just change it anyway. I an't et to the impeller, without removing th
>> base or something.
>
> Are you sure that it is an induction motor? A physically small capacitor
> could well be a suppressor.

IME, they are always induction motors.

> Assuming an induction motor :-
> A jammed motor would hum as would one with a dead capacitor. You should
> be able to pick up a generic capacitor of a similar value on ebay
> Search for motor run capacitor followed by the value and mfd

You can roughly test a capacitor by running it in series with a 40W
mains filament lamp. It should light dimly.

Dishwasher pumps often fail due to water leaking past the shaft
seal and into the motor bearing, where it quickly destroys it.
It only needs a small amount of mechanical resistance to prevent
the motor starting - they don't have much starting torque.
I have repaired a pump when this happened, but they are not normally
repairable and you'd be after a replacement unit.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

[F]

Have a look in/ask at
http://www.ukwhitegoods.co.uk/forumsphpbb3/dishwasher-forum/

Quick and accurate help.

--
F

[Bob Minchin]

Andrew Gabriel wrote:
>> Are you sure that it is an induction motor? A physically small capacitor
>> >could well be a suppressor.
> IME, they are always induction motors.
>

I was not sure - we have never had a dishwashing machine. I married one
33 years ago and it is still working well.