Question about Bosch Classixx WFL 2066 Front Load Washer

2 Answers

Bosch WFF1401 motor does not turn

Machine stopped rotating the drum and blew fuse and lifted MCB at some point in wash cycle. The direction/speed selection relays on the PCB are clicking in and out as they should and using a meter on the motor 6 wire plug I see 240V across pins 1(or2) and pin 3 and a switching 25V across pins 1(or2) and pins 3, 5 and 6 which switches from 0 to 25V The brushes were very worn and have been replaced and re-fitted twice. If I knew what volts I should see on the various pins I would be able to determine if it's the control card (not worth replacing at £180,) or the motor. I have not pulled the motor out myself so not sure if there is a taco device. Is the switching 25V expected? The only capacitor is on the mains inlet and I sassume nothing to do with starting the motor

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  • steve_haycoc Jul 28, 2010

    Bosch WFF1401 washing Machine stopped rotating the drum and blew fuse and lifted MCB at some point in wash cycle. Now the unit goes through it's cycle water in water out etc, and the direction/speed selection relays on the PCB are clicking in and out as they should. Using a meter on the motor 6 wire connector I see 240V across pins 1(or2) and pin 3 and a switching 25V across pins 1(or2) and pins 3, 5 and 6 which switches from 0 to 25V as the relays select The brushes were very worn and have been replaced and re-fitted twice. If I knew what volts I should see on the various pins I would be able to determine if it's the control card (not worth replacing at £180,) or the motor. I have not pulled the motor out myself so not sure if there is a taco device. Is the switching 25V expected? The only capacitor is on the mains inlet and I sassume nothing to do with starting the motor

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  • Master
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The switching 25 volts is should be 0 when off and 25 when activated
I would measure voltage at the motor. If voltage is correct, then measure the motor with an ohmmeter and see what you get. You should have a strong reading at the motor. If not, motor should be replaced. Can you spin the drum freely by hand? If not, check the drum bearings

Posted on Jul 28, 2010

  • steve_haycoc Jul 30, 2010

    I will pull the motor and mega down the various windings and also check segment by segment at the comutator to check I don't have a rotor winding down to earth. If I plug the motor connector in TURN THE POWER ON and initiate a cycle, I don't get a fuse pop or the MCB lift so if something did short in the motor it's not shorted now.



    Not being familar with small multispeed motors the 25V switching on an off threw me a bit as I expected higher stator voltages but if 25V is about right then there is obviously nothing wrong with the control card and the fault has to be with the motor? As the capacitor is directly on the mains inlet before any card or component in the machine I assume it is purely for smoothing and plays no part in motor starting, unlike me old dishwasher where the single speed motor was capacitor started.



    Thanks for the help.



    steve H

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  • Bosch Master
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Actually, the Capacitor can short and stop the entire thing, Whenever a unit blows a fuse or breaker, it is usually something major, and is usually some form of short circuit, or very close to one.
As such, it can be an easy thing to look for as you are looking for a short circuit between Phase and Neutral/Earth... that simple... so meter out the Componentry until you find your suspect component(s).
The Voltage on the Pins may be OK, but the only way to know for sure is to consult a manual.
One really must get a service manual, as inside this are ALL Voltages circuits etc. I have Googled, but have not been able to find a manual, you may need to contact Bosch direct, I am sure they will supply you with a manual.
Below is a DIY self help washer repair website.
http://www.washerhelp.co.uk/diy-repair-help.html
However with a unit such as this, it may simply be uneconomic to repair, as apposed to putting the money into the repair into purchasing a new unit, with a warranty.. Often these days the cost of repair is almost as much as a new unit.

Posted on Jul 28, 2010

  • steve_haycoc Jul 28, 2010

    The machine is still going through the cycle letting in water heating and pumping it out etc., and the motor control relays on the circuit board are sequencing and I get these switching 25V voltages at 3 positive pins on the motor connector plus a 240V at one pin. I have not taken the motor off yet to check where each pin goes (Brushes or stator windings) but I will.



    There is no dead short anywhere now with or without the motor plug on and the capacitor which is simply on the mains inlet cable is obviously working (At least with no real load).

    I very much doubt that Bosch will be very forthcoming with a service manual even to a chartered Engineer like myself.



    I gues my one question to tou is do the 25V switching power connections to the various coils in the motor sound about right is this the kind of voltage you would expect to the stator give a 240V supply to the brushes/comutator

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