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Fault:
burnt out heater, heater live wire and thermistor connector.
I changed heater and thermistor and wiring. also changed brushes as they were getting low.
everything ok apart from the spin cycle is aborting.
spin starts at 11 minutes, best i can get it to do is to get to 7 minutes before it aborts to 1 minute.
i thought it was the new brushes not seating right?
do these machines abort the spin because of the motor or is it the module playing up since heater fault???
any thoughts please.
Re: Bosch WFO2864
Bosch electronics are fairly robust :rolls: You may be right about the brushes, I have noticed this happening occasionally probably down to high resistance usually as the top end of the spin starts to pick up.
Re: Bosch WFO2864
This fault on BSH group washers has been mentioned several times on this forum and I don’t think anyone has come up with a definitive answer (not even gegsy :)).
I’ve observed this once myself on testing after replacing brushes on a Siemens washing machine but (having tested everything) I asked customer to put it through a complete wash cycle and to let me know if there were any problems. Never heard anything so assume all ok.
Might be worth getting customer to try a normal wash and see what happens.HTH
Bryan
Re: Bosch WFO2864
Hi
Have had one of these abort a few mins into wash when I had a dribble of water from leak coming into contact with NTC plug causing bizzare readings from NTC to module.
It may be as Malt says, whereby weird resistence readings from motor are not what module expects and therefore aborts 😕
Earth leakage may also send it to oblivion 😕Greg
Re: Bosch WFO2864
Cheers for responses.
When i left i told customer to run on 2 long washes before using with load. fault still occured.
went back to reseat brushes, told customer to do above again, will get outcome tomorrow morning!
thanks again.
Re: Bosch WFO2864
Don’t ask me why Tim but I’d ask her to try a wash with a normal load instead of empty :idea:.
Bryan
Re: Bosch WFO2864
NTC failure or a break in the circuit can cause this fault and many other strange ones, although the most common reason they abort in spin is due to brushes not seating correctly, I have found this with both genuine and pattern brushes & usually need going at with a white brush seater stick. The electronics are very sensative on the Eurowashers.
Running spin reduction can help for the first few washes as the abort usually happens as the machine creeps towards a higher RPM.
The burnt out wiring I have seen before and has always been caused by a leak from the seal or heater area
HTH 🙂
SteveRe: Bosch WFO2864
Persistence with the empty loads finally allowed brushes to seat properly.
Customer has reported all is well and spin isn’t aborting anymore.
must be very sensitive controls on this machine as have had worse seated brushes on other models/makes without this sort of problem.
anyway received cheque in post today. 😀
Re: Bosch WFO2864
timdowning wrote:Persistence with the empty loads finally allowed brushes to seat properly.
must be very sensitive controls on this machine as have had worse seated brushes on other models/makes without this sort of problem.
😀
Don’t you just love the world of electronics? 😥 I can remember machine’s that you could cook toast on the sparking armatures 😆
Re: Bosch WFO2864
Sorry for hijacking the thread but the NTC would it stop the heater from heating? I know this soundsa lame but heater tests ok. PCB or NTC I thought, unless the heater comes complete
Re: Bosch WFO2864
Johnnyboy wrote:Sorry for hijacking the thread but the NTC would it stop the heater from heating? I know this soundsa lame but heater tests ok. PCB or NTC I thought, unless the heater comes complete
Yes faulty NTC’s can stop heaters working, if the resistance of the NTC is wrong then it gives a reading to the electronics saying that the water is hot enough, also some makes of machines advance out of the heat “stage” if the NTC is OC
Re: Bosch WFO2864
Ive watched alot of the Bosch m/c’s jump from 7 mins to 1 min,I personly think the control module is allowing for an “out of balance load”.Probably wrong but thats what I tell customers.
Re: Bosch WFO2864
timdowning wrote:spin starts at 11 minutes, best i can get it to do is to get to 7 minutes before it aborts to 1 minute.
Dansta wrote:Ive watched alot of the Bosch m/c’s jump from 7 mins to 1 min,I personly think the control module is allowing for an “out of balance load”.Probably wrong but thats what I tell customers.
What you should point out to your customers is that on a ‘spin only’ cycle most Bosch/Siemens/Neff m/c’s only do a slow short spin cycle. As the programme is intended for spinning hand washed clothes. Fast spin is not an option.
Whilst the start time indicates 11 minutes it only completes 5 minutes of that time and reaches a maximum speed of 800 rpm before switching to 1 minutes drain.
If they care to read their user manual they will see!:rtm:
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