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Identify interlock relay on washer main board.

cj66

cj66

pfm Member
As per title, an Electrolux EWF10843 washing machine.

Fault; intermittent, door lock not opening at end of cycle.

Checks done; Pressure switch, pressure tube, door lock all tested and seem fine. Checked the inlet solenoids as well, all pass.

Suspected cause; door lock relay on main board.

Problem; no service manual found so how the bejesus do you identify which relay on the board is for the door lock?

I have not yet removed the board as the machine is still in use. (An unplug from power for a few mins and then replug usually clears the fault.) but include a piccy from the net.

original-1607761733442.jpg
 
Carefully check the actually door mech'.

Ages ago one model used to drill a hole in the mechanism with the interlock device itself, so that it never accepted that the door was closed. It would also jam.

Well worth careful eaxmination. Dead easy to fix too.
 
Door and interlock are good.
I have already narrowed the fault down to the lock relay on the main board.
I just don't know how to identify it for confirmation and replacement.
 
Looks technical. If you don't solve your problem here try the UK Whitegoods site. There is also a forum on there. It is not as busy as this one but then again washing machines are a bit more specialised than general hifi. Perhaps the equivalent would be a specialist forum on DACs...
 
Be wary of mechanical wear to the door interlock. The switch might be working when operated manually but with wear the mechanism can be just shy of fully closing the contacts when closing the door normally.
 
@Johnjo

Good thought but I already tried with a spare "pecker" so I could test and all is good. I was concerned that may be the case as when the fault first occured the lock was operating open/close in rapid succession. There was a little more history to the process than I gave in the OP. There was circular fill and drain going on and an error code denoting drain problems. The drain stand pipe was too low and syphoning. The pressure tube and switch had some muck inside, I cleaned those and the pressure tank out. Ran clean washes and rechecked, no new gunk.

So original perceived faults are partly sorted, leaving what I have now i.e. intermittant failure to release the lock.

Your previous post about tracing the wires and tracks is valid if the friend will allow me to remove the board to do so, before knowing what relay to order.
 
Alvarado said:
Looks technical. If you don't solve your problem here try the UK Whitegoods site. There is also a forum on there. It is not as busy as this one but then again washing machines are a bit more specialised than general hifi. Perhaps the equivalent would be a specialist forum on DACs...
Click to expand...

Yes, have done that but no responses as yet. It's a VERY quiet forum!
 
Looks like all the realys are the same??? That does not solve which one to change though.

I can't reconcile the fact that the fault is an energised lock and it being opened/de-energised by disconnecting/reconnecting the mains, with a relay failure.
 
Our Panasonic's door lock is fussy how firmly you close the door. If you close it too gently it insists that the door is open. My wife has no problems, I often have give it a slam! Perhaps it is my mechanical sensitivity?
 
That is, of course, a good way around the problem and I'm wondering why I didn't think of it o_O

Your link lead to the wrong pin type HTF and 100 min. qty. but did get me to where I needed to be thanks. 5qty. ZTF :cool:
 
Please report back! This seems an adjunct to Tony's right to repair thread. The gate controller for my front gate gave up the ghost the other day, with a 'thyristor failure' whatever that means. I had to buy a whole new board (not cheap), but kept the old one, as I'm sure there must be some way to resurrect it as a spare. No sign of burning etc. Will post a picture if anyone's interested, but it strikes me there are loads of bods on here that could make helpful suggestions to keep old stuff working. But then again.... :)
 
@Nero,

Long delay for closure! Finally got to remove the board from the machine. It was very obvious which connectors were for the level sensor and therefore simple to track on the board as well.
The board was, however, potted in a rubbery resin that made the job far more irksome than expected. I assume the manufacturer would claim longer life for the board but would guess more to disuade component change and purchase of an entire board, as most service centres would do.

Anyway, relay swapped out and all is good.

ZNf9Jjw.jpg


HlKGpsp.jpg
 
Just to clarify my post, it turned out the dedicated relay for the door lock was ok. However, the relay for the level sensor was not and "spoke" in the same circuit. The effect being that the level sensor worked for water control but hampered the relay for door lock.
 
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