Hotpoint WM52P

[13amp]

Got a funny one here. This machine fills drains spins washes heats, everything appears normal, Except that during the time the motor tumbles on wash and rinses, the pump is energised for a fraction of a second and keeps being energised say every 1.5 secs as the motor tumbles, not enough to pump any water out mind?????????

The motor brushes were shot and replaced, the motor meggers up just fine. I reckon it is a quirk within the Timer/Module unit myself?

Anybody out there come across this before I wonder?

13

[wizard]

Could be one of two things. The pressure system on those has an extra high water level setting which brings on the pump, should a valve stick open & it floods, so there could be a problem there when water is moving in the tub with motor action – try taking the belt off & see if it still does it with no water movement. The other thing they suffer from is tacho cables chaffing on the motor casing, which can cause processor glitches, although it normally results in the processor crashing during the heat stage & boiling up. Still worth checking though, unlikely your fault caused by the controller itself.
Hope this helps.

Wizard

[Penguin45]

Two thoughts – one simple, one ethereal.
You may recall all those Hoover pumps years ago that broke a coil wire where they joined the brass terminal blade? I keep coming across Askoll type stacks with the same problem. The vibration throws them off the terminal, so they stop and then reconnect when the vibration stops. The Copreci ones seem to be the worst offenders – which is the one generally found in later Hotpoints.

The other one is it is a classic transistor failure. A lot of digiboards use transistors rather than triacs for low current switching – pumps, watervalves for example. I can’t remember off the top of my head if this one switches direct off the timer part or through the circuit board, but might be worth investigating.

Hope that helps,
Penguin.

[13amp]

Re: Hotpoint WM52P

Thanks for your thoughts so far fellas. I left the problem with the customer to get back to me after she tried a washload or 2. Not heard from her yet.

I don’t think it an overfill problem although I take your point wizard. The water level was way below the door seal as I recall. Not a faulty pump either as I put my test leads on the motor plug connector block and it gives short bursts of 240v every 1.5 seconds, only while the motor rotates. If I disconnect the motor, then the pump stops doing an Irish Jig also. So it must be a Timer/Module transistor thingy problem I reckon.

Will get back to you if I hear or do more to the machine OK

13

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