Smeg DWI612C D/W pump spasms

[myfil]

Customer has an integrated (don’t we love em!) Smeg Dishwasher Model DWI 612C (No: 040 7585 183). At start of any selected prog we just get the pump running for a couple secs, then nothing, then the pump running for a couple secs, then nothing…..on and on. During these pump “spasms” it does throw water up the waste hose (sump water level is normal for startup).

No error codes are showing on the indicator lights – they just act normally. I have stripped out the pump (it is fine) checked waste hose for blockages (none) inspected the components base pan (dry as a bone) checked the pressostat hose (not blocked) and the antiflood floatswitch hose (OK).

The “reset procedure” (hit pgm button 4 times quickly etc.) will not work – well I got it to work once in about twenty attempts, ran the procedure, nothing changed however.

Anyone got any thoughts or advice?
I’m reluctant to just say “Oh it’s the PCB” and spend all that money unless I’m on a really good bet. (I have not inspected the PCB – I guess I should have, looking back. But I have four days to fix this before I go on holiday….. :cry:)

[Bill]

Re: Smeg DWI612C D/W pump spasms

Well I have the same probleme and have tried the module with no luck. If you find out what the fault is before I find the cause would you let me know.

Bill Ellis 🙁

[eastlmark]

Re: Smeg DWI612C D/W pump spasms

If you are getting no error codes then i think it will be the timer, worth checking the dispenser coil first though as that throws up all sorts of faults and can even damage a new timer.
Not sure about yours Bill, but lets face it all the other parts can be tested. if all fails change the timer board.

[kwatt]

I’m with Mark on this one, it does sound like a PCB failure to me as well.

It should be this one which is pretty common.

K.

[cornwell40]

Re: Smeg DWI612C D/W pump spasms

Have got similar fault, tried coil on dispenser and is open cct. Tested rinse programme through using a spare solenoid and it gets activated with 240v all the way through the programme. I know these are tested through to give fault codes etc, but surely that can’t be right. Sounds like the board could be faulty as well or am I being over cautious.

Tony C

[PINKY]

Re: Smeg DWI612C D/W pump spasms

We’ve three in the last week.Dispenser coil o/c.
The same as you Tony as soon as the dispenser is energised it remains so.
Pcb and dispenser.Sorted

Pinky

[myfil]

Re: Smeg DWI612C D/W pump spasms

Thanks for all the help guys.

Went back to the machine and the detergent solenoid coil was almost O/C and arcing on the Megger test. Swopped it temporarily for a bog-standard water valve. The machine then started up fine and started running OK through a pgm, but the indicator lights were all wrong – 5 stayed on and 1 and 4 flashing=no known error code! Couldn’t alter this.

So we have a new PCB and detergent coil on order.

How the hell a dispenser coil can cause such a weird fault and nuke the PCB is something for future sages (and Chinese PCB designers) to ponder…….

Cheers.

[Author]

Posts